I love the PvP, but I haven't touched the BoB stuff so that might be a factor. I've hit rank 3 in Bell Bros and Dragons though. I've seen a lot of Avellyns, Havel's Greatshield, Moonlight Blade, Hexer's Hood and Dragonrider Bow. I also haven't had much problem dealing with poise. By the time someone hits me enough to stagger me they've usually used enough stamina to not be able to take another action.
You will get staggered from one hit when they 2-hand a weapon. No amount of poise can withstand that. Unless they are using a dagger or something.
I only think it's great. I was tired of the attack spamming poise powerhouses in Dark Souls. Now they at least have to pay attention. It's a good change if you ask me.