Pianist here. I see where you're coming from, but I definitely do also rely on the different shapes of keys to know where I am without looking. I've been learning to play the button end of an accordion and personally I find the uniformity makes it harder. But maybe that's just what I'm used to.
As an aside, I find c major a horrible key to play in, again I think the uniformity makes it harder and less ergonomic, but the same thing makes it easier to teach to beginners hence why everyone starts there.
As an aside, I find c major a horrible key to play in, again I think the uniformity makes it harder and less ergonomic, but the same thing makes it easier to teach to beginners hence why everyone starts there.