I think I'd keep the shower...
Do you have dogs?
Do you have an elevator for temporary disability living?

If you keep the shower, it will be a great place to wash off your dogs. Also, should anyone in the family need "first floor living" for a short or long period of time due to injury or permanent disability, they will be able to bathe. Just a thought...

The sightlines (from the garage entrance, not sure about the "porch entrance" to the mudroom) aren't going to let you see the bathroom immediately upon entry anyway.

I'm not sure how you plan to rework the kitchen when you remove the L part of the counter, but right now the first thing people see when they enter through the front door is your stove. You might be planning something really fancy for your hood and backsplash there, so that's what you want, but I thought I'd point it out, in case didn't see it.

The step down into the great room is dangerous-- people are going to fail to notice and fall, and it's really hard on older or disabled people, for very little pay-off.

Aside from that I like it, although I'd want the great room more connected to the foyer. Since it's the most likely destination for guests, having it so completely disconnected from the foyer seems a little awkward to me. It reads like an addition, not something that's been part of the house all along.

I'll post the other images in the thread so you get more participation:

What is the dimension of the upstairs hall bath toilet/tub room?
I'd be tempted to rotate the toilet 90* (against the outside wall) and put your linen as a built-in on the "empty wall" (or where the empty wall is) separating the 2 spaces. Then, extend your vanity for more room between the 2 sinks.\

Agree on the step down for the GR. I missed that the first time.