What's Firnfeld?
Seriously though, I can't even recall how these maps look like, so I second all that was said above. Most achivements locked in my progress log are map achivements, and that's bugging me. I get to play 3v3/4v4 matches once a month if lucky, and when I see one it's half empty.
And I doubt, that matchmaking will bring much difference, if that's what Muse is thinking. Matchmaking may solve one problem with 3v3/4v4s, which is waiting time, but that's not the only thing, that draws players away. Judging from my own expirience, and what I've heard from some other guys, big matches can get laggy as hell, while 2v2s are perfectly fine.
That's why I think, atleast some of big maps should be avaliable as 2v2, even if that means changing their gamemode to DM.