I give Wrigley Field a 10! Go Wrigleyville! Go Cubbies! You can't find fault in Wrigley, besides that it's old. You don't expect padded seats or a Jumbotron. I also like the dimensions of the field.
Everything else is pretty accurate, though I'd go a little higher on the Rosemont Horizon, maybe 7.5, because they had some very nice bathrooms there. It didn't seem like an arena bathroom. (Maybe I inadvertently wandered into an exectuive suite?) Concessions are pretty decent as well. Good job rating the Chicago venues.
For Milwaukee, also known as Chicago Lite:
Bradley Center: It's very plain. Standard-issue arena for basketball, hockey, and other such attractions. The interior atriums and lobbies aren't too special, but I will say that the event staff is very helpful and courteous. Milwaukeeans, being simpler Midwestern folk, just seem to be really nice. Also compare Summerfest with Taste of Chicago for backup to this argument.
Miller Park: The exterior is very nice, and the roof definitely stands out from the skyline as you're going down whatever the freeways are called there. The park seems decent from the inside, though the roof has been known to leak inappropriately. In this regard the park emulates a Milwaukeean stumbling down the street after one beer too many.
Milwaukee County Stadium: It's gone now. But when it was here it was just a non-descript concrete bowl. Nothing noteworthy at all.
I haven't been to Lambeau Field and would really prefer not to. I have also yet to make the trek to Camp Randall Stadium.