I’ve tried Krita on Win 7 and only get basic support using the Morph. Sensel says they support Ink APIs in their user guide; Krita (like most older Windows apps) uses WinTab. Their latest pre-alpha says it has Win 8+ Ink support, but whatever that is, it apparently isn’t what the Morph uses.
I’d love more technical details on just what the Morph supports for input APIs; whatever it is, it’s good enough to get Corel 2018 working on my system… I might be willing to put in some dev time or at least communicate with the Krita team if I knew…
