The maps alone disqualify it from competing against UT. YOU HEARD ME.
spoiler (click to show/hide)
http://www.bosskey.net/q3a/maps/standard.html
Q3DM2
Q3DM3
Q3DM4
Q3DM6
Q3DM11
Q3DM15
Q3DM16
Q3DM17 (a classic that a lot of people love, but not me)
Q3DM19
Q3Tourney2
Q3Tourney3
Q3CTF1
Q3CTF3
Q3CTF4 (I like it :yeshrug)
Meanwhile UT has... Facing Worlds.
Now granted, map makers filled in a lot of UT's weak map line-up but the same could be said for Q3A. The base maps though... I dunno. I think Quake 3 Arena has far more solid with a few stupid designs than UT.