It’s never an easy decision. I guess if you’re wanting to have a one telescope/camera setup then an idea on your image scale will give you a place to start. As you’ve got a wide field refractor and a 10” newtonian, you’ve done a bit of both.
As JA mentions, the KAF-16200 only has a 35mm diagonal so you could possibly still get away with your current 2” corrector unless you feel it has already been starting to degrade with the KAF-8300.
Alternatively I could potentially bring around a ASI094 full frame to give your current setup a test
