I played melee for the most of my life. I know there are enough ways to to deal with those issues.
You simply can't deny that melees currently are too strong. Maybe not every single one of them, but Demon Hunters, Arms Warriors, Rogues, Ferals are all way too strong.
Try to play a warlock in PvE in LEGION. It feels like you are in hell and you have access to one computer and that computer only has access to one website and that website is full of pictures of emma watson, but those pictures are photoshopped and emma watson has the body of melissa mccarthy and basically you are screwed and hate life.