I certainly wouldn't call it "new," whichever the side of the fight you are on. Some healers aren't comfortable dps'ing and some people aren't comfortable running with healers who won't dps and there's a lot of friction between the two sides. Honestly, I've seen both sides get pretty rabid about their positions and as I don't really have strong feelings either way, I tend to steer clear of most of the arguments. Still, it's been around at least since I started playing (ARR,) though it did seem to get more heated in late HW.