1..This is where the imp teams (you know who you are) shine, their players are individually better. Think outside the box (read:guild).
For the Republic
Not so sure about that. For two basic reasons: First, rep has also brilliant players. Guys like talionis, hennessy, k'rath, obi, mitth, they can be as good as some of the best imp players. Second, some of the guys that you might think that are the best imp players also have a pub toon. I played with a Physics(one of the best pvp guilds imo) premade a few days ago, I expected to win when i saw them, but the other team had Jediyy (who also has a brilliant marauder) and Churb, and they were enough to beat our team.