@im9today - i don't doubt it, but i'm just going by my experience. i've only rarely seen good morganas and never seen one carry the game as an ap carry. maybe she's supposed to be played as more of a support/ap? i don't really see a good role for her on a team. even if she's mid and holds her own mid she can't get like 20/6 scores because her late game damage output is so low compared to normal ap carries
i don't think she's bad bad but in my experience sitting in the lobby i'd be more comfortable with a random pub picking annie, ryze, brand, malzahar, lux, karthus, swain, vlad, kassadin, veigar, anivia, or oriana as an ap choice. but i'd still rather have that person pick morgana than cass
She's def sort of a support AP with a brutal init. If you can get her in the center of the enemy team ult and then use the active on the hourglass it's usually over for them assuming the rest of your team cleans up.
She's def one of my best characters in a team situation. I use her when we need a tanky/AP like morde.
Sad to see so many people calling for morg nerfs all the sudden.

what do you mean by a snare and a stun? what is her stun? i don't recall her having one
That's the best part. If the team stays within her ult for a short duration they get stunned and damaged again. Her ult can do about 400-500 damage twice to every team member as well as slow and stun them. It's like a weaker damage version of Kat's ult that slows, stuns and can't be cancelled.