I also hope it follows the 2k4 route instead of the UT3, althought I didn't think that UT3 was that bad, anyways, the current map isnt really small, its just too narrow.
The next patch sould be a big map ( 8 x 8 ) with vehicles, according to the post on their forums, I'll post some screenshots and thoughts as soon as it gets released.

But the actual map is ok, it has a 8 player maximum which fits perfectly and keeps the crazy-action of the arena fps ongoing 24/7.

The only actual bad things I've found so far is
the Pistol rate of fire being too low
shotgun reload being too low, especially if you use the alt fire.
Rockets projectile speed being too fast
plasma projectiles being too low

but they're working on the weapon balance.

also, I'll try to keep this thread up with the patch notes and any news I receive.