Let me pain that picture for you.
If you have the entire RLD team cross-CCed, with dispellable debuffs, the warlock can imp dispell himself, sac the imp, then imp dispell the healer, who then can dispell the rogue.
I'm sorry, but how can anyone take threads like this serious? Why are people always exaggerating to try to prove their point?
If you let the warlock have an imp around that is not sacced when you go for the CC you plan to force stuff with, then that is your own fault. Imp literally flops in a second through healing, so you can just kill it almost insta everytime it's summoned. Not to mention the fact that the range of a summoned imps dispell is so small that you can take advantage of this aswell.
Kill Imp / Force it sacced -> CC Warlock -> CC what you want -> Profit.
I'm not in any way defending imp dispel, it's really broken, but stop spewing bullshit like this, it makes you seem dumb.