The only thing that bugs me about Debbie is "apply lotion" scene. It always ends the same way - Debbie saying something like "we should stop" - no matter at what stage is her relationship with MC. This makes sense early in her route, but after she and MC are already lovers this should evolve into full sex-scene.
I hope that DC will take time to add alternative ending at some point in the future .
Well, her story will get a rework like Jenny and Diane at some point, which means all her scenes will either be redrawn or replaced/removed. I'd guess we'll see a change in parts of her early story this update, given that she's closely connected to the main story, though that won't affect her scenes, sadly.
I hope DC works on debbies scenes in the future but it won't happen anytime soon.
As far as I understood it, DC wants to have a really big poll with many options next time. So she may be included again, though I'm not sure how high her chances to win a poll actually are.