i really think that there is'nt a need of using crowd control when you are raiding in WOTLK compared to how inmportant it were back in vanilla and the burning crusade. and we got the classes for it even! so i would say they should design instance so we would need it again, just to make it a bit harder and require a bit more skill when raiding.
And before you flame me for saying a bit more skill when raiding heres a explanation:
Back then, did you have to be carefull on what spells you used when you had a sheep up, now in wotlk, can you run in and do whatever you want to do, because there isnt any instance where it is required.
this is just my experienced really. dont know if i am the only one encountering this.