This.
Plus, the idea is you're walking down the middle Main Street, USA. Most real streets have trees...flowers, bushes, if not benches, trash receptacles, telephone poles, ....with posters on them... While strolling past stores with pretty window displays on either side.
To eliminate the trees (and much needed shade, but that's another topic), hanging flower baskets, bushes, benches, they have essentially gutted the small town feeling and turned it instead into a strip mall. Think of it next time you're in your local mall and there are stores on either side of you (nevermind the fact that malls at least have planters and sometimes trees but ignore that, ok?) with pretty window displays and lovely smells tempting you to go in.
I think part of what makes MK MSUSA feel wider and bigger is the lack of greenery, coupled with the giant castle with it's endless expanse of concrete in front of it.