For many years, my main outfit was Canon FD, and I was always more than happy with the optics (I especially liked the 50mm f1.4). I loved the F1 (original) and FTb bodies, but I never really liked the auto models. I had the AE1P for many years as a back-up body, and I found one thing to be really infuriating.......to use it in fully auto mode, one had to remember to set the aperture ring on the lens to "x", if I remember correctly? Anyway, whatever it was, I wasted quite a few shots by forgetting this, and missed even more. I suppose if one was to always use it in either auto or manual mode exclusively, this wouldn't be an issue, but certainly the design is not ideal for someone who often switches between manual and auto operation.
In fact I never really found an auto camera I liked until I stumbled across the Rolleiflex SL35E. These can be found for reasonable prices now, along with their excellent Zeiss-designed glass.
I can't comment on Olympus..........just wanted to recount my experience with the Canon FD auto models.