Seems to me to be somewhat a function of where you have your seat ... with my seat all the way back, almost touching the rear seat, I haven't had a problem. But now that you mention it, I may well look at it more critically ;-)
P.S. I really like the blind spot warning feature ... 'don't depend on it for changing lanes, but now and then someone will creep up, and the mirror signaling is a welcomed extra.
2017 CX-3 GT, AWD, i-ActiveSense, Ceramic Metallic, Black ... His: Zoom, Zoom!
2016 HR-V EX-L, AWD, Milano Red, Black ... Hers: Putt, Putt.