Or, you know, she can work with Winick and he can write Jason. I was just about to suggest that.
The problem I imagine with Grayson writing Jason is that I think she'd emphasize Jason's feelings that Bruce was using him as a replacement for Dick. Which is an angle I prefer to see downplayed most of the time, because I take Bruce/Jason for granted and it's already fucked-up enough without painting it all over with "Bruce wanted Jason to be Dick".
She could write Dick as an awesome bigger brother to Tim and Damian and we'd have a smart, clairvoyant Babs and and and. I miss her writing so much.