It indeed has a lot of power into it. It can reset escape cooldowns and regen ridiculous amounts for that cooldown. I was flaming about it since lvl 40, the coffin off cooldown for full heal on assassins is op regen, since it's a percentage, now with higher hps it has even higher power,and does need a higher cd.
Also, it's not mages "freeze" but "Breeze" and it pretty much does the same thing when it comes to regen, except for the fact the targets are really vulnerable during it, unless they use eva's protection
Speaking of eva's protection, it's the biggest nub skill in game and I still want it nerfed first. You can tank with it,heal with it, win trades with it, escape with it, chase,whatever. Most op skill in the game and I'm waiting for it's nerf first!!!
~peace