Remember when Morgana was a huge problem back then?

She's nothing now. She's useful in some scenarios but that's just her E and a luck of a Q.

In lane, Morgana feels rather helpless. Her Q is very slow and now easier to dodge. Which becomes a problem because once her Q is down, she's wide open and can't protect the ADC. Her W doesn't do anything, it just gives minimal damage and a tiny scare to push enemies away, but since her W is so weak, it becomes an ok thing for the enemy to stay on it for a while.

Towards mid game, her E becomes useful in certain fights but again, once shes used up her Q there's nothing else she can do but auto attack. Her R is only useful when you have a zhonyas in your inventory. Morgana ain't a tank, so chasing serious enemies during her R is rough. She either dies or eats up all the damage.

In late game, her kit now becomes rather useful due to cool downs but lets be real here, late game hardly happens now.

If she were given a buff, I'd say increase the Q speed but decrease the snare duration. Also give her W a slow like Varus's E.

This way her W can support her R and her Q can be much more of use early game. Her W will also be much more impactful since it now slows.

So in the end, her Q is buffed/nerf'd while her W is buffed. Her passive is straight up useless as a support.