(Not a native, potential mistakes)
I don't understand why people whine about arenas in this game. They are, imo, the only place where you can learn to play properly in pvp. 8v8 are too messy to do that, and in general you're so team-dependant that your own personal skill doesn't matter this much. I play a sorc, and 8v8 are boring as hell. Most of the time melee class can't even approach, so I just repeat my rotation endlessly, without even practicing the kiting skills you need to have with a sorc.
So on the contrary : please give us more arenas. They would increase the general level, and also allow people to train for ranked pvp. In the current situation, I think a lot of people don't even dare to try ranked because they aren't familiar enough with arenas.
For the 3v4 / 2v4 issue : it's rare to encounter those at max levels. So it's not an issus, even if I get frustrated as well when I'm in one of those matchs.