speed is a measurement of performance. faster the better. period. most people are very understanding when they see there are 1st timer in the dungeon.

as for bad players who doesn't know their rotation... they really should be kicked. it is now 2017 (almost 2018) and there is no excuse for a MMO player not to search on the internet on how to be better at the job they are playing. No one wants to play with a tank that doesn't tank nor a healer that let everyone die; likewise, no one wants a DPS that can't kill.