Yeah, the buttons on the Roland are not the best. I've gotten used to them, but I would prefer something else. The main thing I don't like about them is that the edges are not rounded off, but have a somewhat sharp edge. It makes it harder to slide your fingers across the buttons smoothly and quickly, in the way that I am used to on other accordions.
Someday, I think I will fix that by buying some "normal" buttons and drilling a threaded hole in the center so that they can screw on the way the Roland buttons do.
It's disappointing Roland didn't spec it exactly the same as an acoustic set up, the sounds were phenomenal, I struggled with the air intake and the buttons.
To deal with feedback issues,
I ended up having a mic made by a guy in Canada who worked for Shure for 30 years, it's external and I use it in a band where I play country) Americana.
I'll post photos if anyone's interested.
Dan