Yes.

I've never quite understood the whole capacity thing. The way I read it it sounds like it's based on percentage not total attendance...? If that's the case, what's the downside to having a 10,000 capacity stadium (i.e. in custom leagues)? Even the 2008 Lions could fill a stadium that size and boom...you've got 100%.

I'm sure I am missing something.

There is no downside, other than looking a bit ridiculous. The actual stadium seat count is just like any other thing you can change in a custom league - purely for cosmetic purposes with no actual impact on the game itself.

I tend to agree regarding punt coverage. I rarely have an issue with PRs being "overpowered" since I set my gunner depth chart a bit better.