

Circles are the worst possible shape in terms of making efficient use of the limited screen space available on a phone. The screen is rectangular and nearly everything we display falls into rectangular arrangements. Using circles just means there is less room on each key to show useful information, like the long-hold functions.
I’m not opposed to change, but change entirely for the sake of change usually produces bad results.
I have added the swipe library to FUTO. It works, but not well enough for me. (That may be my clumsy swiping, but the issue remains.) I estimate that it gets about one word in four wrong. GBoard is still wrong about one time in ten, but at that rate, swiping and correcting is still much faster for me than traditional typing.