Honestly, there's a simple solution to these problems, only provide an ingame parser on high end content, Ie: Extreme, Savage, Ultimate.

Also tell us how much hp the enemy dummy has and how long it took you to kill it for stone, sky, and sea and other similar dummies you wail on.

I don't get why content that has a partywide dps requirement also has no way of getting feedback on the performance of your party without the use of third party software.

And if you're afraid of elitism in high end content, git gud, that's all I can really say.