I think your ideas are evolving nicely -- don't rush. Take your time, mentally walk through meal preparation as you look at the plans, think about where you're storing the knives and the spices, think about what's near the dishwasher, think about where the trash can is located. Think about where you're storing your bulk-purchased paper towels, your cleaning products, and your seldom-used holiday tablecloths. This is a biggie: Where's your stand mixer? Think about where you'll set out a bowl of fruit or a cake that the kids are free to snack on after school. Think about where you're keeping your coffee maker. Think through making a sandwich or a plate of leftovers for lunch -- are the bread, mayo, knives, microwave all conveniently located together? Think about traffic patterns as you come home, as the kids make microwave popcorn, as you clean up after dinner. Think about your taking-out-garbage path. Think about the small kitchen tasks that bug you (for me, it'd be putting away silverware and having a spot for dirty dishtowels), and figure out how to alleviate those small things.

My thoughts:

First, I do like the slightly-relocated mudroom door. It does spit people out "past the action" in the kitchen.

I moved the refrigerator near the entrance door for two reasons: You come in the door with groceries, you want to be able to set them down on the end of the island and put them away close at hand. You don't want to walk the length of the kitchen with them, interrupting the cook. Also, with the fridge in this position, people can come in and get a drink without interrupting "the real work area".

Yes, this places the refrigerator farther from the breakfast table, but it's now halfway between the breakfast table and the dining room.

I'd put everyday glasses in a drawer on the right of the sink so they'd be convenient both to the dishwasher and the refrigerator. Of course, you also need a drawer for knives and other prep items in this area; however, with 9' of island, you're okay: 24" for a dishwasher, 36" (hopefully more) for a sink, and that leaves you with a 24" stack of drawers for prep items and an 18" stack of drawers for glassware.

I left the sink on the island. You spend most of your kitchen time prepping, and the healthier you cook, the more time you spend in prepping. I much prefer to do my chopping and mixing "facing outward" and with nothing over my head -- and with good lighting; with no window in your kitchen + pendants over the island, this'll be your best-lit space, and your head won't throw shadows over your work. In my current kitchen, I have two 15'+ counter runs -- yet I do all my prep work on a bitty 3' peninsula because it faces out towards the family room. I don't think I'm alone in this preference. As for dirty dishes, get a BIG sink, and they'll be hidden below eye level. Yes, BIG sinks are expensive, but the sink is the most-used item in your kitchen -- not the place to skimp. The negative: Island sinks are expensive. Why? Think about how the plumbing has to be run; it can't go through the walls.

I'd leave the dishwasher to the left of the sink. I assume you'll store dishware on the far end of the kitchen (on the outer edge of "the real work space"), so the dishwasher'll be located conveniently close; it'll also be close for clearing the table.

I took out the prep sink for several reasons. First, a big sink on the island is centrally located, and a prep sink just isn't necessary in a kitchen of this size /layout. Second, people don't tend to like to work in a corner, especially a corner facing away from everything. As for handwashing, you don't want to encourage the kids to come into the cooking area to wash their dirty hands; if this is a big thing, put in a small sink in the mud room; if it's not a big thing, get them in the habit of going to their own bathroom to do their washing -- but don't let them do it over your clean vegetables. Finally, keep in mind that this is a moderate-sized kitchen, and a prep sink will essentially "eat up" a whole cabinet.

I'd downsize from a cooktop and separate ovens to a simple range. Why? You say you're not big cooks now -- so why buy multiple items? The price difference is astronomical; really, a cooktop alone costs almost as much as a whole range. You can opt for one of the two-oven ranges and still spend less than the three items you're proposing. And, again, storage space. Every time you say "yes" to another appliance, you're saying "no" to storage.

I'd keep the range on the back wall, but not quite opposite the sink. I drew it near the corner, thinking you'd store pots and pans in a corner lazy susan, but it could go towards the other direction just as easily.

I don't think you want both your sink and your range on the back wall -- too much stuff crammed together, and all of it facing the wall so your back's to the family room and away from natural light.

Finally, seating areas. LOVE that picture LL shared above. Banquettes are the best (and, yes, a banquette is a built-in bench for table seating). But do you really need the breakfast nook AND the island seating AND the dining room? Plus you probably have an outdoor eating area on the deck or patio. Do you really need all these options, or have you fallen victim to the "but this is what people do" bug? Ask yourself, how do you envision your family sitting down to eat? Build that space -- and build it well -- but at this point you have excessive eating areas, and none of them look really special.

One more thought on eating areas: Note that once you place a table in the breakfast nook, you won't be able to open the only door to the back yard. I'd lose that door altogether and make one (or both) of the windows flanking the fireplace into a door.

And my last thought: I'd switch the mudroom and the pantry. You don't want a window in your pantry; even a small amount of natural light will greatly decrease the lifespan of your dry goods -- yet a window in the mud room would be very nice. Here's how I'd do it -- oops, I put the to-the-house door in the wrong place; we'll just have to live with it, but you'll get the idea:

I moved the garage entrance down a bit, but you still have a large bench for sitting down to take off shoes /storing shoes and bookbags underneath ... and you have coat hooks nearby. You could include a small sink, if you wanted. You can also use the bench to set down grocery bags as you sort them out and put them away. And, of course you'd want a good-quality, very long floormat to grab up all the dirt and keep it in this room instead of letting the kids bring it into the house.

Finally, to get rid of the natural light vs. food problem, I'd go with pantry cabinets -- if you get Ikea stuff, they're surprisingly affordable, and they have options for 4-5 drawers vs. just plain cabinets, etc. This also places your pantry a few steps closer to your kitchen.