And please when you hunt in party and 1 of the 2 guys got a task, its very annoying to untarget, isnt it possible to get it as a party kill ?

I disagree. It would be far too unbalanced since people just would take the same task and power level so easy.
However assigning the kills to one certain player is something I could agree upon.

You should make a possibility to add potions to the hotkeys. My mouse suffer through it :(