The hardware you choose plus adding panels to the front of the dishwasher and refrigerator will make a big difference on the appearance.

Don't put the DW in the prep space between the sink and range--move it to the right.

@Michael Menn Ltd. when you say panels what do you mean? Any hardware recs ?

Take your uppers all the way to the ceiling.

And I second Mama Goose on moving the dishwasher to the right of the sink. Sink to stove traffic is too high. Your dishwasher will become an ongoing frustration.

“@Michael Menn when you say panels what do you mean?”

@Lify - Michael Menn is talking about you purchasing a panel-ready fridge and DW onto which panels that match your cabinetry are applied so that the appliances appear part of the cabinetry. This will add many thousands to the cost of your reno if you have not already budgeted for it. Particularly for the fridge. People who want a seamless look for their cabinetry are willing to spend the extra. I am not one of those, so it depends on personal preference.

Regarding the height of your upper cabinets with an 8’ ceiling, you want your cabinets to meet the ceiling. On my phone, I could not read if there were cabinet heights in that plan. If it were my kitchen, I would have the configuration of 39” tall upper cabinets plus 3” crown. Some people like a bigger crown, but I’d rather have the utility of additional cabinet height than a thicker crown. Some lower-level cabinet lines do not make a 39” tall cabinet, just 36” and then 42”. I would seek out a cabinet line that does make a 39” tall upper. There are many, and it does not mean that they are high-end/expensive.

Regarding your comment about tile backsplash - wait on that decision until everything is installed. It is quite difficult to choose a backsplash just based on cabinet and counter samples. You didn’t mention what your counters will be. You need to see it all in place before choosing the tile, so just don’t think about the backsplash for now.

Do you want the legs on the island seating area as a design element? Personally I would use large brackets underneath instead of the post legs. Easier for cleaning and you’ll be able to move the barstools around more.

You don't have enough clearance around the island (42" min for one cook, 48" for multiple, measured from the countertop edge / appliance handles, not from the cabinet side).

Can you reach the windows to topen and clean them?

Corner sinks also use up a lot of cabinet space.

Definitely move the dishwasher to the right of the sink.

The range is in the middle of the path from fridge to sink, which can be an issue with more than one person in the kitchen - what if someone who isn't cooking wants to wash some grapes from the fridge while the cook works at the range?