Here's a thread that provides a "fun" way to highlight what people think is the main problem with each class. What would you do if you could only change one skill, trait, or base ability to fix the game? Feel free to either do one for all classes or just the ones you are familiar with. You can also do one per elite spec as they sort of count as a "class".
Renegade coffee thoughts: https://en-forum.guildwars2.com/discussion/34989/major-renegade-rework-suggestions-thread