First they need to take the 3 sec cd off windfury or at least lower it to 1 second. It's not cheap in pvp anymore because witht he new health pools theres no way its coming close to 1 shotting anyone. Second enhance dps drops substantially when they have to switch targets or move, boosting the damage of searing totem would help this and wouldn't be op because right when enhance use lava lash it removes all the stacks. That about it really, blizzard is just really horrible at finding solutions to enhance and claim its because they are hybrids, which would make sense if there weren't other hybrids topping charts...
there won't be any enhance left b4 long. I gave up on them a long long time ago.