An in-game healing parser sounds like pure cancer.

Can you imagine how bad players would react to it? They'd spam heals to get high HPS, purposely not DPSing or overhealing like mad. Even if the devs decided to make it EHPS instead of HPS, I still cringe thinking of how it'd be received by the basic player. Of course there's parsers out there already, but I doubt basic players use it.

Now an in-game DPS parser is another story. I'll take that, although I doubt we'll ever get it.