Even as a permanent horde (and an evil shammy) I’d always argue against removing bubble. It’s been a staple of the class design for the entire game and should remain in any rendition of paladin pvp. Maybe have some limitations on mobility while in bubble, but it seems crazy to remove something so important to their tool kit.
having never fought shammy tanks being a horde, I mostly took everyone’s word for it as usually the masses don’t usually lie. 1 duel against one and I immediately understood why everyone hated them and I wont be bothering with anymore duels against them. Lucky me