As a relatively new player i would agree with CWSilk. Players who don't meet "1100+ no gray" requirements usually have no real options to play big teams except Astrogaps and other boring stuff. I totally avoid 1v1 in most games (not only supcom), i try to avoid 2v2 except the ones with premade team and voice chat, so i play big teams only and it gets hard to find/host a map which is not Astro crap. Tried to join some autohost mapgen lobbies, but these games fill really slow and usually unbalanced because of 0- and 1500+ in same lobby.
So what i would really love to see is big teams TMM (at least 4v4). With different maps and without dumb hosts who make "no gray" restrictions or just building their own dream teams to win. And maybe also remove gray colors and game number from lobby screen since it does nothing but aggression to new players and we have a whole generation of white ranked players with huge game number who have more unpredictable real skill than grays of same rank.