It's almost what's happening to me sometimes.
I've got some animations to add to a website, so I've acquired Spine for that. Now I'm trying to use it on a game, to use the flexibility Spine gives on changing skins and everything. But I really misses Flash.
I've heard that Moho have features for gamedev, and also the web, while including drawing tools. Looks like an "better Flash", but, well, I've spent money on Spine already and I'm tired of switching softwares.
Spine is cool, and I dont believe that making it read Animate's json is hard, but... I'm really low on time to keep an eye on that.
I will be back if I find something new.