If they would stop making bosses that turn instantly, and constantly, positionals would be bearable, but as it is atm it really turns me off these classes. If they should be removed is one thing, but it is my number one annoyance with these classes for sure.

Now, general statement. If you are someone who instantly has a kneejerk response whenever you see a suggestion for a reduction in complexity, NOT ALL COMPLEXITY IS GOOD. If it leads to shitty gameplay it should (obviously!) go. First of all you need the correct amount of total complexity for class balance. And that doesn't necessarily mean 'a lot'. More important than a minimum amount of complexity is a maximum amount of complexity. If something needs more complexity, then add it in a fun way. Don't cling to annoying mechanics because "mah complexity".