Morgana's kit needs to be completely rebalanced.
We get it. Black shield is strong. Unfortunately, the strength of black shield makes every other ability in Morgana's kit basically dog shit.
Q - High damage, high root duration. Insanely slow project speed, insanely telegraphed wind-up animation, and is very easy to dodge unless you walk up right next to somebody.
W - A completely worthless ability that costs an insane amount of mana. If you miss Q this ability may as well not even be castable. Quite possibly the single worst champion ability in the game.
E - Amazing, I guess. People act like it's a panacea. It isn't, but it's good.
R - A fairly worthless ability without flash. It's good occasionally. Absolutely destroys immobile champions bot lane.
Here's the problem: If you miss Q as Morgana your champion is dog shit and cannot function. That's simply not true for any other champion in the game. Literally no other champion. For example, if you miss snare as lux you still have a low cooldown ability that does damage in E. Your ult does ridiculous damage.
If you miss Q as morgana... 1.) Your W basically can't do more than one tick of damage 2.) You will be run down and killed 3.) You can't even reliably land ult against anyone with a dash or flash.
So your entire kit doesn't work if you miss an insanely easy to dodge Q.
The solution is simple and there a few options:
1.) Morgana's root duration is nerfed considerably and the protectile is given a much faster speed. Say twice as fast speed for half of the duration.
2.) Morgana's W does more upfront damage and less over time. Make it function closer to Neeko's.
3.) Give Morgana a faster Q and buff W and remove or rework blackshield.
In fact, awhile back I talked about nerfing black shield to make it only a personal ability. Because at its core Morgana's shield is is built for personal use.
For example, if I'm running down somebody with ult I'm going to blackshield myself. It makes no sense to black shield somebody else if I can be stun or rooted or forced to juke people while chasing down someone with ult. So at this point blackshield isn't even utility. It's an ability designed so that I can be allowed to use another in my kit.
Conceivably you could take blackshield and make it only self-castable and then buff Morgana's Q and W to bring her in line with other mages. This would move Morgana out of bot lane and back into mid lane.
Although, she could still be used bot lane similar to other mages, and her shield would function against hook champions on a personal level as well as allowing for body blocks of hooks and spells similar to sivir.
Anyway, Morgana as a champion has some strengths, but honestly she's pretty fucking bad over all. People find her frustrating to play against, and yet despite being annoying and "anti-fun" she doesn't even win games. She currently has a 49% win rate. Her mid win rate is unfavorable against just about every assassin, and with the buffs to Edge of Night she's hard countered by a single item.
I'm not sure why Riot dropped the ball regarding Morgana last February, but dear lord something really should be done. A 49% win rate champion shouldn't be one of the highest ban rates in the game. Just fix her kit.