Cloak of Shadows is overpowered for trainable

I know most of you will say `` you dont have to beat all classes`` or `` you made this post coz a rogue pwned you `` or `` l2p`` but really there was nothing I can do.

Last night we were 2v2 with my elementa/resto shaman friend.2 rogues came on us.I killed one but other killed my friend,I feared him and bandaged and kept nuking at him when he was %40 he was at melee range I tried to shadowfury and stun him but could not because of cloak of shadows.

Now normally this is okay you would say he used his cooldowns etc...But cooldown is only 1 minute.Deathcoil is 3minutes.And I used mine at start.

Not only he used his at start,he used his again and where I could win I lost the fight

It is a talent what rogues need to survive against casters but take this perspective:

Superior melee damage.Stunlocking abilities.Chance to go invisible and open the fight and control it.And now...a TRAINABLE ( this is the part its annoying) skill that gives %90 resists,dispell everything for 5 seconds.I know 5 seconds is not too long but its enough as I stated at the start of post.It is enough to change tide of battle.

My suggestion is increase cooldown to 2 or 3 minutes if it stays trainable,or make it 41 point subtlety as it was in the past.It is a skill that is overpowered to be trainable.Its like making unstable affliction or readiness trainable as well.Its overpowered as long as it stays trainable or cooldown is increased whatever you say