A DPS calculator in the Mists?
Nope.
If you really want to know your DPS you’ll have to Fraps your combat log over ten minutes, then watch the footage and manually calculate the numbers and figure it out. Kind of pointless, though. Sustained DPS doesn’t mean anything for PvP. PvP is too situational and you’ll never follow a min/max DPS rotation.
I think a “get out of combat” button would be great lol.
If your any good at programming, take a look over some combat log parsers for other games and write one, its pretty simple. I wrote one for champions a long time ago, but be aware, you will only use it a couple times before you get bored with it.
If you do write one you should pm me, I would love to try it out.