seeing as most have you have mentioned about the stadiums, which I feel that they have done really well to improve this year, I'll mention something about the crowds.
I think it's good that in some matches, mainly master league, unless you change settings in other areas such as exhibition matches, is when you play games where there isn't a full corwd, so you can see empty seats around the arena.
I first noticed this when I played Fulham away in the master league. It was quite empty, so probably when the crowd is set at 1 out of 3 stars. I think this looks good.
Anyway that's my opinion, just thought I'd add it.