In fact, I believe they can be improved than destruction during the final season of WoW Cataclysm Classic Gold the expansion. Dhemaji Warlocks can also be pretty decent. They're not yet there, but they get very cool spells like metamorphosis, and if played correctly they'll do extremely well in tools, one of of my all-time favorite things about Warlock and wrath, apart from the fact that they can get demonic port is that they possess a dream soul that they can use.
If you train to see the target when they're at or below 25% health, it'll do four times the normal amount of damage. This is absurd because even if the victim heals back to full health, it's going to do four times as much damage for the rest of the cast. So if you don't get kicked on that train, it's almost unhireable damage. I've seen trade sold ticks for 6k Plus.
Contours are one of the most intriguing classes in Wrath of Lich King PvP They have the most skill-based cap of any single class in the entire expansion. Marksman Hunter has crazy utility and has commercia performing different actions based on the state you're in. Honors also have deterrence it is able to be ready, which means more sacrifice but also a lot of usefulness and tools that did not have in TBC and the classic.
The Wall