Im gonna be honest, I think personally stacking mechanics are mostly pretty boring and shitty in mobas, they feel so tacked on in most cases. Right now, it feels like that with talon/bebop/Mo's stacking. I think they could come up with much more interesting upgrades and eventually just dump the stacking entirely. Unless they add an LC like character, where their whole fantasy is centered around getting kills to strenghen themselves, Id rather we just dont do them at all.
As for lash, his 1 is cast from the air, so hes pretty hard to notice, and it knocks up as well, so it NOT one shotting in the ultra late game is a pretty fair trade off