If Fortress builds were any good I might agree, they were sleazy. But they suck. So they're just annoying.
We have a player at my venue that played Triple Firespray every tournament, right until the Shuttle came out. Then he swapped on for a Doom Shuttle and two gunners. He's a good player. But he hasn't won a tournament with it that I've seen. With either build. That should tell you just how non-sleazy it is, when one of our better players can't win with it.
When I say Sleazy I mean it is brokenly good, to the point you have to match it in cheese to win. That just isn't so. Any half decent, metagame conscious build can win. And that basically means every build that doesn't spend too many points on cardboard, Tie Advanceds, or A-wings. There are a few things that are underpowered, but nothing that is overpowered.