When they nerf healing then it will die. It's like tobi in 1.0, you didnt want to use him, but because everyone else did, and your mastery couldnt touch the imbaness of that dodge, most players "had" to use tobi to counter tobi (and lets not bring up earth shields lol at that time). In a similar vein, water dps like cho-mei/tenten-mei (unless you have the power advantage to nuke down a ninja fast) can no longer hold up against these heal teams if they survive r2 intact, forcing a switch to heal-vs-heal instead.

meta always switches with new release (version or ninja), just need to tough it out and ride the wave till it changes again. Edo treasure isnt going to impact meta as far as I can see, so guess we wait for the next one (jinchuriki?) or the next version update, whichever is first.