What I agree with: requirements beyond ilvl such as equipped job and having learned a certain amount of skills beforehand. No, its not going to stop bad players from being bad but it does go a long way for accountability.
Class quests need to be revamped in the form of adding actual gameplay of new skill obtained. This is useful for the new people who want to learn. Keep the class stories but add a mini "smith" instance for learning bane for example.
Enhance the tooltip by suggesting priority moves. For example, they could put a star on heavy trust or hot shot, with the class trainer heavily suggesting to start the dps with those skills first.
I'm going to end this by saying I don't actually believe there's an increase of bad players. All potd has done is basically take a flashlight and show where the roaches have been hiding all along.