A small Janna ultimate buff idea.

So recently I played Janna again after her ult got a lowered AP ratio. I'm like.... why? But there must be some reason why it was lowered. Still... she has to channel it and she's really vulnerable for the duration. Not to mention squishy. If the heal is going to be that weak, then why not give a complimentary buff to the ult in another way? I was thinking maybe... enemies heading towards Janna inside the ultimate are slowed by a small amount and enemies inside heading away from her get a small move speed buff until they leave the ult's range. Marksman, mages, and champions with gap closers can still have their way with her if Janna's team is unable to protect her.

Something very small, but I thought I'd post the idea out there.