I recently had a break through with my guild leadership involving Kara.

I've been offering to bring in part of my team so we can start clearing trash while we wait to fill the raid. After several weeks he finally allowed me to bring in my lock, mage, and hunter.

The 3 of them were the top 3 on the dps chart when we got to nightbane. This of course prompted a bunch of questions from him with the end result being told he now has no problem with me boxing during raids.

It did help that I'm one of my guilds raid leaders so I guess I've got a little bit of credibility with him.