After reading this thread I think some of you are way too invested in what other players are doing whom you will never see again after the instance is over. It has been stated many times how easy regular dungeon and trial content is so demanding 100% possible uptime with best researched rotations and weaving is completely unnecessary. If you really feel someone is performing so poorly that you are no longer able to enjoy the game then maybe try to be helpful or leave the instance. A lot of people think saying something like "Do you now what you are doing you noob use (whatever skill they are not using)." is helpful criticism when it most certainly is not.