Seri, personally I think the game will at least be okay, as Bioware writes good stories, and I like good stories over a lot of stuff. However, as someone coming from eve, here is what I see as possibably "bad" about it.
1. Its on rails. They have said that there are branching storylines, but in reality, I don't see how much branching they can do with eight different story lines. And your character will go from point A to point B or maybe point B, or C, or D, but there is really no room for RPing like there is in EvE.
2. It looks like this will be a grind fest if only in the sense that you will have to play the game to advance in level, but that's every other MMO besides EvE I think, so no real surprise there.
3. There have been no real menction of social zones. I am sure there will be, but it is unlikely there will be much of anything besides talking in them, and it will probably be hard to RP.
4. Once you join a group, you are at the mercy of the conversation roller. Yes you will not get dark side point if you chose the light side but the roller choses the dark path, but you still have to go through with the dark side path. You can't turn on your team, and can't do the right, or wrong thing in spite of them. I see why they made it that way, but coming from EvE, its a let down.
5. Space is on rails. You can not fly freely, all the space combat portions are on rails and you can only move your ship a little bit around on the screen, not change your course.
So, really, this does come off as a single player game that has multiplayer PvE and PvP parts, if you want to play them. I'm okay with that, since its fits my pretty casual play stlye right now, but I'm not going to even try and RP with others in this unless something major changes for how things seem now. That is one of the few things I missed from Galaxies in this.
And about the classes, from everything I have seem, the classes are mirrored, just not exactly.
Trooper and Bounty Hunter are about the same and both can be DPS or Tank, but in different ways. Trooper gets the big scarry guns, while Bounty Hunter gets gizmos and special attacks (like flamethrowers, etc), but both can have armor. It seems the same for other classes. Smuggler get the quick draw and up close stuff or dual pistols, while Spy on the Empire side gets sniper rifles and poisons, but both use cover, and both can heal. So not quite the same, but roughly similar.
And the trinity I assume you mean is the damage, tank, confusion one? It kinda works, but there are not many real clear lines. Most classes seem to focus on tank or dps, with the confusion stuff sprinkled around for crowd control.