First thing first, why do you want official damage meter in the game, that's the question.
if: you want it to see your very own numbers only.
That'd be pretty much pointless. How does the number matters if you don't know the average and how you do compared to the average? It shows you number, it doesn't tell you whether you're doing it right or not and where to fix. You need target of comparison to know how you're doing. And I'm 100% sure you'll get bunch of ppl automatically consider ppl who set theirs on private as "not good enough to be shown on public", which is one risk of toxicity (gatekeeping, at minimum).
Example, let's say we got this feature ranking your DPS and you got an "C". Party wiped on enrage. Ppl start asking each others' dps and everyone's DPS rank. Will you be able to say that you're C when everyone's B? And will you believe it when ppl claim that they're A? Or that they're higher than you even when they died once? What would you think when someone goes "I'm not telling you my numbers but I guarantee you I'm doing good"?
"Private" setting doesn't help, it just won't work.
if: You can't clear content without DPS meter.
It's not about DPS meter to begin with. DPS meter shows plain DPS numbers. It doesn't show you the fight's mech nor why you die (and I'm assuming you don't need any DPS meter to know if someone died or not mid fight).
It may show you "who" lacks the numbers and causes the enrage, but then what? Tell them to DPS more? If they can they'd have done it. Kick them from the party? That's exactly what the dev want to avoid.
Here I'm assuming that the "DPS meter" mentioned here is basically "a feature to show your DPS numbers" and nothing more. Nothing logs, nothing analysis, nothing to show rotation nor timeline, no timer nor mods, nothing.
Now back to the main question, if you get this DPS meter, how would it be of your use? Do you actually need it?