For me it depends on what part you make the center ground. If its the RL part of the map then meh. If its at the giant power cylinder.....thing then Id certainly play it
that sounds pretty interesting. Id certainly play it but it would need more than just a SG and RL. Also for the whole flatness aspect maybe adding some elevated walkways like the ones in q3dm5 could mix up the game play a bit, but thats just my opinion.
It would also need a RG and a Quad Damage/Battle Suit to work pleasantly, maybe a BFG hidden somewhere (probably in a secret would work), & also, I'm not a very good mapper, so this might just be my very first Quake 3 map (q3tourney1ctf).