I think it's more relevant when you're doing stuff lowmen and/or multiboxing.
But of course it's relevant in many other group fights as well.
Albumen and Warder of Courage come to mind.
Lilith too, and so on.
I wouldn't go as far as to say it's relevant in every single situation though, especially if you do large group content with proper (good) players instead of mules/bots.
When the +3s come out theres really no telling, it could be full blown ridiculous to the point where it has "enough" meva to use care free. Other gear at the time could influence it too, you might get enough meva/dt without a body. Just gotta wait. and wait. .... and wait.
I dunno.
My impression is that they really gave us an insane boost (for the time) when they released the reforged AF+3, and they tried to contain themselves a bit more when they released Relic+3 (which, save some insanely OP and some other nice pieces, wasn't really stuff that makes your jaw drop).
So what will they do with Reforged empy? Continue on the same wavelenght as Relic? This is what I expect honestly.
But they made us wait so much time and they are likely releasing a new event tied to it, so who knows.