Guild leaders need to start taking responsibility for some of the burnout their players are experiencing. Think about it for a minute. If you're forcing your guild (or if your leadership is forcing the guild) to constantly run STR, that's bad leadership and of course people are going to get burned out.
Here's some advice, if you can clear T5 but you have to run them back to back to back to back. Do 2 T5s, then do 2 T3s, and give your guild a little break. You don't need to do the max possible difficulty every time.
They already said they're increasing rewards in the raid, so once the content update comes out maybe it'll make this strategy a little more appealing to those that are saying "I hate this raid, but I'll only do the max difficulty".
Me and my guild really like this raid and we are seeing a lot of progression. We're not a serious guild. We run raids in a way that prevents burnout. I hope those of you that are officers in your guild adopt a similar strategy.