I've recently involved myself quite a lot in PvP and WvW. Activities for which my guild trains a lot. And for that, we usually go to the guild hall arena and fight there.
Only problem is : it's a PvE balance.
So i thought : Why in hell would you use a PvE balance for such a thing ? PvE people will NEVER have to try their skills on another player. It makes no sense. And there are the fractals and raid golems for that (although one could argue they too could easily be improved).
The guild arena is for people to fight other people, so it would only make sense to get a PvP or WvW balance, so that we could try our damage , effects, durations, cooldowns, etc. on other players, similar to what we would face in the real world of PvP or WvW. Now, i get that PvP balance might not make a lot of sense considering Anet probably wants to push custom PvP arenas for that. But then, why asking us tons and tons of gold for that Arena ? But at least, introducing a WvW balance shouldn't be that crazy of an idea. Even more so considering there is no way to "train" your WvW gameplay, while there has some possibilities for PvP (custom arena or FFA arena) and PvE (golems).
And if you consider the fact that you can set up 3 teams (and more) in the guild arena, this really looks like it's meant to simulate WvW landscape.
I'd appreciate some feedback from a dev/rep on that matter.