I have to say I am thoroughly disappointed. They seem to me like large arenas more than battlegrounds. Mounts don't hardly come into play and I can't even hardly see the point of them. Guarding carts in the mine and I still haven't figured out the other one as I have only gotten into it once. I think a battleground should have a large feel to it as if you are really fighting for a territory or some sort of objective. I would not have a problem with it being in a building/city setting but these new battlegrounds really seem small and squirmishy.
I think I will keep the mine on my blacklist.