A class like this would sound pretty awesome. One issue though is that there would have to be a Republic mirror. Every class is mirrored after all.
Jedi Knight = Sith Warrior
Jedi Consular = Sith Inquisitor
Smuggler = Imperial Agent
Trooper = Bounty Hunter
True, I got some work to do IRL but i'll post a Counter-Class when I get the chance. Thinking up some ideas . . . though now that I think of it, if the Republic does come out with another class, it doesn't exactly HAVE to be a counter to something . . . just brainstorming a smidge.