Well tbh a dps meter is a great tool don't get me wrong. Although can you imagine how many people will whine, cry, tell their mother, make pity parties, or whatever in the forums?( no point in hiding it, this is a care bear community. Just say something not even remotely offensive someone would be offended here) SE will probably have to hire more gms just so they can keep up with the new sets of reports this will bring in.

Honestly...we have people crying here because they have to skip cut scenes...that's not not even a big thing. I'm not even gonna start with other stuff people whine about.

Tl;dr:
We're not mature enough as a community for a dps meter. It's a necessary tool yes I completely agree but as a community were not matured enough for it.