I'm not in a right position to talk about Warriors, Knights and Gladiators, but there's a certain thing: Knights' "powerful" blocking ability suffered quite a blow.
(Outside of them, Evade has become less useful than before as well, but whatever.)
A useful data for PvE side would be this (even though there are all Classes), :
Hmm Ranking's for PvE
The things with PvE is there are dungeon's and mission maps. that are vastly different.
-All classes are able to get SSS in a MM, although not everyone is equal.
-All classes can solo elga, although not every class can farm the boxes at elga.
So ask yourself first what do you want to do? Dungeon's or Mission Maps?
Dungeon's require just DPS while mission maps require skills (to get a score)
Here's my depiction of dps/skill comparison.
<Quote has been edited accordingly to the topic in which it is posted. Whole post here.>
Classes closer to the right have more skills that can help score higher in Mission Maps At faster paces.
While classes closer to the left have less skills to help, albeit they can still reach same score just not as fast.
and obviously the amount of damage per second is the y-axis.
Overlord mobile moves that deal damage and moves a fix distance relatively a popular class due to cosmetics of (huge two handed sword)A
Dragon Knight High frequency tornadoes with a support skills ( a ninja's best friend )B