Overall I don't disagree with your points Akira. I'm not a fan of number 2 though. I think it's a huge change to game mechanics that need further testing before even thinking to implement it.
The design of the map for any size game 1v1 2v2 3v3 4v4 is of utmost importance. Its just as important, if not more important, than any system for making larger games more fun. Thats one of the biggest reasons the current patch for 1v1 and 2v2 is so good. The maps got patched and are so much better than before. One of the big, still unadressed problems is maps arent made for a SPECIFIC game mode (1v1 only, NOT 1v1/2v2) hybrid maps are a terrible idea and i know it scales to matches with more players.
+1. Maps design are one of the most important things of coh2. However I gotta say I'm not that satisfied, at all, with the current maps on the list (specially in 2vs2). Still are maps that clearly favor a faction and also position in maps which are nearly gg. Coh1 had really good maps on 2vs2 and also the community has made nice ones by their own. I don't know why relic is not putting them on the list or patching better the ones we have.