I don’t use SwiftKey, just tested it because you shared a tool for doing it and claimed it was able to subvert Android permissions.
You probably didn’t actually disable the permission – like I said, the idea that an app could get around system-level permissions like that, in a way you could plainly observe would be headline news. It would be astounding that you somehow uncovered something that massive.
Unexpected-Keyboard: A lightweight Android keyboard. (github.com)
The gesture support for additional signs is quite nice, but probably annoying if you are used to swipe keyboards.