Yeah, I do a lot of bgs with guildies, and I can only think of a couple of bugs that I and others have found really objectionable.
1. These bugged trinkets- such as the "kidnapped puppy" and "Terracota warrior" and "voodoo gnome" trinkets. Often the same exploiter has the first two trinkets and runs around a bg with 10 or so full-time stampede pets. Why these trinkets haven't been fixed or (if they can't be fixed) removed from the game is not clear to me.
2. Occasionally the demos at SOTA will become "friendly" to the defending team so you just have to watch helplessly as they break down gates. Obviously a game-breaking bug when it happens.
Those are pretty much the only ones I can think of. I don't really hear complaints from team-mates that this or that class ability of theirs not working properly. All of my toons' abilities seem to work fine.
The issue with Frostwolf pvp is not bugs, but the fact that not many new players are joining the server since they will have to go through such a painful gearing process.
If need be, they could just create an npc to give out free grievous tier (head, chest, etc) pieces. Yes, that would hurt those who sell crafted pvp gear, but that's a price that should be paid if it means a new players on Frostwolf doesn't feel like the path forward is so dismal.
New players are the lifeblood of a server. Just see what happened to Neltharion when they refused to make the server more welcoming to new players. Is Warmane really going to follow the Neltharion playbook to the bitter end, on Frostwolf as well? It's a flawed system that ultimately hurts Warmane as well as its players.