One of the local shops ran a 150pt dogfight tourney back in December of last year and it was an absolute blast. Great change of pace from the 100pt format IMO.
On one hand I know the game balance could handle a boost in points (from 5 to 50) with no problems. The reality is that the game doesn't 'need' to add points to the standard format. There's plenty of variety at 100 pts and you are forced to make some hard choices (as evident by the number of perfect 101 or 102 pt squads I come up with, but can't legally run). I think this is a good thing in the long run.
So I think the occasional 'fun' tourney with more points and casual games is the place for 100+ pt dogfights. And then there is epic DF if you want to use more ships w/ more stuff in an official tourney.