"Arena PVP" is Horrible

3v3, and 5v5 are fine

Why? Star wars is a huge IP, bioware can do without the kids that want wow-style pvp.

If 3V3, and 5V5 were truly fine, then hypothetically team composition wouldn't matter. But team composition matters a great deal in WoW Arenas. Team A composition in principle beats team B composition (if all other things are equal).

And the reason why this is stems from the fact that each class isn't balanced against every other class for 1V1 encounters.

5v5 requires every Class to be viable in one or more composition of 5

I'm sure it's been said already, but let me say it again -

If you haven't played a level 50 in DAoC up to at least RR5 then you have no idea what "good" PvP is. Here's a clue, it damn sure isn't instance based.

WZ's are a hoot sure, but they're controlled and you have to do what someone else wants.

I want freedom to roam and hunt.. Not so I can gank someone or some group, but so I can meet my enemy on the battlefield, no rules, no objectives, no clock, just us vs. them. I don't want to know where they are or where their going to be, I want to have to LOOK for them.

You think hunters would ever want to bag a deer in a zoo?

Sometimes I also like to solo. I might get rolled all day long by zergs and groups. But I might also get that one perfect 1v1 or 1v2 that makes it all worth it. In the end, when the challenge is greater then so is the reward. and kids, objective based instanced pvp is not a challenge.

That's not sufficient for balance as evidenced by the fact that some team compositions in principle beat other team compositions 10/10 times if all other things are equal.

If class A in principle beats class B 10/10 times, presuming all other things are equal, then, obviously, 5 As versus 5 Bs isn't going to be balanced. And this is exactly what we observe with WoW.