Is this being updated for wrath?

[Sakatard]

was getting some lua errors on ptr and beta, so guessing this needs to be updated

[pingzing]

No plans to update this to tackle Wrath. It'd require a fairly significant amount of work, and I'm not planning to play Wrath. That could always change, but you shouldn't hold your breath.

There is another addon that aims to fully modernize the original RatingBuster that has early Wrath support here:
https://github.com/raethkcj/RatingBuster/releases