I fear warplots will be a massive failure. I mean, the idea on paper is kinda cool, build your base, stuff it with your slained pve bosses etc. But from my experience, managing a 40 man pvp its even more terrible than the PVE counterpart. From what i understand its a sort of guild vs guild, on an instanced zone. Problem with it i think there will be very few guild that will be able to pull that. Even on gw2 (at least from the time i played) there was few organized group and mostly random ppl hopping up. Arena teams works cause its easy to organize, and is easy to find 2, 3 or 5 ppl that want the same thing and coordinate themself. But 40? from the same guild? Yes, there will be some dedicated pvp guild, that will run it, but i dont think the majority will be, and it will end with the same couple of team runnin, and huuuuuge wait times. Dont know really especially on a game that point so much toward competitve pve.
I would prefer a sort of old alterac valley concept, with maybe a min number of 5 or 10 ppl that build and control a base, and then allows for randoms to get in.