On beta the 4set is already changed to a 5% damage increase to certain spells instead of the soul burn soulfire SP proc. If they change the 4set there really will be no meat left on the bone for players that remain capped at 85. The T13 set really brought warlocks back to life in cata level content. I just remember clicking Potions flamecap doomguard and gear macro before a pull felt like i was a thief. And it is still working now. Lets not forget that everyone else will still have their 4 set questing thru 86 but a lock will have gear with gemslots. This will come up alot since you can farm the set bonus in lfr.