Wait, but... did he still murder all his previous wives in this version? And she/readers just never find out about it?

On the one hand, having plants all over the place would fit in pretty well with Gene Roddenberry's idea of utopia (they are there because being around plants makes people feel good psychologically! ... or something). On the other hand, that really, really doesn't explain the bizarre lack of taste in the actual plant choices they made. Or actually, given a lot of the rest of the design, maybe taste just doesn't survive utopia?