>>32571820problem is that
1 you need to actually use the move for the healing to start negating an important part of the leftover healing (healing entry hazards and healing ontop of a recover the next turn)
2 if you switch out for any reason you lose the buff
3 it takes up a precious moveslot
it's not a proper replacement for leftovers and it most certainly is not a proper replacement for recover or even rest
ingrain has the same problem and the only reason it was ever used was on BP chains for it's side effect making said chain immune to whirlwind and roar