Is there anything from a different game that you would like to see implemented or tested in Overwatch?

I'm curious if there are mechanics, formats, features, systems, playstyles, settings, or balance philosophies that exist in other games that you would like to see adapted to Overwatch.

There has been some discussion of bigger systems in the last few weeks (Bans), but I'm also curious if there are smaller or more abstract things you'd like to see implemented in OW.