Most planes have this. Most pilots just hold the propper deflections to counter the roll as the mix is always changing due to power changes in the engine due to air density on different days. gassers have this change less with air. Ie right rudder causes right roll add left aileron. Simple now did I need a mix for that? Seems silly to me but if ya want them to look smooth its what ya gotta do!!
My ultimate and most my planes have roll coupling to some degree it is just the ultimate has lots of it. As it is short coupled. My pitts is even worse!!!
Thanks for the posts