DPS display could easily be solved with a system already in game.

[Massterchef]

I would rather SE just officially support 3rd party parsers, so that they can be improved. And people don't have to worry about getting banned.
(only downside is PS3/PS4)

Whether they officially support them or not is not the issue because people that use them aren't afraid of getting banned at all. The fact that a PS player does not have the option to even have one is the issue.