I never had a bit of trouble backing up my Catalina 27 because it had a fin keel and the prop is wide open to the water. It was almost like parking a car, and it had a tiller. My sailing buddy had a C-27 also, with a wing keel and a wheel. It was just as easy to back up.
Now, with my full keel 33 Morgan OI, backing up is a crap shoot at best, wheel or tiller doesn't make a bit of difference. The boat just goes where it wants to go at the time, could be left, could be right, and sometimes, on rare occasions, it actually goes straight, regardless of the rudder position.
Now, when I had the 27 Catalina, that tiller didn't really communicate sail trim to me, and neither does the Morgan 33 with the wheel. I just kinda feel the boat as if it were attached to me and instinctively steer where the performance seems best. Maybe being old and spending most of my life on the water has something to do with this - don't know for certain, though.
Oh well, hope the OP finds what he's looking for.
Good luck in your quest,