I don't mind arena combat, as long as it's mixed with some neighbouring rooms and corridors. Just a big arena gets very boring, very fast.
About apex, I don't mind the textures themselves - IMO, one can make some pretty darn cool maps using Half-Life textures - but the way they're combined and lit is appalling. I mean, no offence, but it's just plain ugly, they way some textures are put together. On top of that, all surfaces in the map look flat and boring.