I was heavily into the West End Games D6 RPG 15 years ago, and in all editions the Tie Fighters were faster than the X-wing. So I grew up always thinking that Tie Fighters were faster. The Star Warriors dog fighting game of the 90's also had Ties being faster.

The fact that the Ties in the trench crept up on Luke cutting through his wingmen always reenforced that Ties were slightly faster than X-wings.

You're correct, the game is incomplete, and that's a wonderful thing.  If you're tired of what you have, be creative, make your own scenarios and try new things.  Make it work, find the silver lining.

1.)  I'm not really sure what to say about the first point, other than:  Consider your action to be 'Avoid Collision' and be happy both ships don't take damage, or this game would become a very annoying conundrum of heavier ships trying to ram the lighter ones.  You're not losing your action, you're just making sure you don't lose your ship.  Again:  Find the silver lining. 

2.)  The range of cinematic fighters: TIE Fighter/Advanced/Interceptor/Bomber for the Imperials and X, Y, A and B Wings for the Rebels(Keep in mind the Snowspeeders are restricted to atmosphere).  We already have half of the original trilogy starfighters.  If Wave 3 includes the Bombers(Maybe the Lamda Shuttle as well?  Not sure why, but in the sake of being thorough), we'll be out of classic small craft.  This means Fantasy Flight will be tapping the Expanded Universe and, I shudder to think, the Prequel Era. 

3.)It's been said, but I'm going to support the previous commenters:  It's the Barrel Roll.