So Neeko is basically just Morgana but with less sustain?
Both have a skillshot root, both have an area DoT (though Neeko's ticks slower), and both have a delayed aoe stun on their ulti. The Main difference is that neeko has the clone/invis thingy instead of black shield, and the passive doesn't seem to me like it'd change play much, since it's very easy to proc (though I'm sure it'll cause a few funny moments, I just don't think it has any real impact on the playstyle). I suppose the root does work a little differently (Morgana's root is worse with minions around, whereas neeko's is better), but for the most part their playstyle and combo seem identical to me (at least when playing ap).