Just look WPvP 40x40+ lags and ppl disconect and you understand all.
In any place where there are massive epic battles, there will be lags. On the battlefield, a little better (because there is only 40x40), if it is in an open world, and there are still some players nearby, you will want to delete the game. Blizzard does not want to correct the problem, because not so many players play in WarMode, and a lot of money and effort are needed to solve the problem. He writes even less about this problem. Sometimes it seems to me that they specifically ignore this problem. Everyone who cares about the fate of WPVP support the topic with a post and like, thank you!