I don't think this will ever happen for 2 things:

Many people will be upset look at that 'other thread' for details.
We do already have what we want & a friend can parse a PS4 players DPS.

They allow the mod because they realise if they would ban it they would loose 90% of the raiding community, if they would make an official meter then 90% of the 'non raiders' would leave.
In the end SE wants to retrain as much people as possible for their money.

Maybe a bit of exaggerated numbers but that's how I see it.