I have. Worked alright. The problem is it relies on the person in lane to do the work early game, because Morgana can't solo kill anyone unless they are super low until she gets some items.
But then you get those games where everyone is playing super safe, and everyone is sitting at 90% hp and then your team wonders why you don't gank... it's like, that's not how ganking works, you have to have an opportunity to do so... they need to push up and get like, 60% hp or below. Otherwise they are just going to walk away and you will have wasted your time.