Mangoose
Arcane
PVP balance will probably be fine because 3-faction PVP tends to balance things out on the battlefield. There is no strongest faction because the strongest faction is the 2 that have teamed up against 1.I'm done with it so I won't be experiencing the PvP which, given the comments on the ESO forums is pretty much par for the course for PvP in that all sides feel that the other sides are OP and that PvP is "unfair." On second maybe PvP is going to be interesting since that tends to imply some sort of mystical balance but, then again, the max level in the beta isn't very high.
What they do need is some manner of investing the player into the WvW/PvP mode. DAOC apparently did it but I haven't played. GW2 did NOT do it - some speculate because you keep rotating servers and thus don't remember any notable enemies. Though my opinion is that GW2 set the same set of races and classes against the same set of races and classes, which made things quite bland. In DAOC I guess you were always fighting these cultures both different from you and antagonistic, with their own classes and special powers, and that helped immerse the player into fighting the enemy!