YES I do have one huge suggestion. I did this when I put an addition on my house for our parents when they were live and it really makes a difference.
Instead of putting the outlets and phone hook-ups close to the floor, bring them up to about 36" off the floor. Yes it ok to do that and you can also check with the inspector about it if you have any questions.
As we get older, those outlets at the floor level get harder to reach. By bringing them higher up the wall, it makes it so much easier to reach and you don't have to stand on your head to get to them.
I did that in the whole addition which consisted of a private sitting room, Laundry room and a handicapped bedroom with private bath, which is now used by my husband and I. No we aren't handicapped yet but we originally added these rooms when we were taking care of our parents. They are all passed away now so I have turned the sitting room into my sewing area which is a 12' x 14' room.