Having used a variety of TLRs, one important factor I have seen is sample variation and camera condition. I've seen Yashinons that are great and some that are pretty pedestrian. So many Yashica-Mats were made, and the focus rails and such are not the best, so alignment could be a major factor.
Since the Rolleiflex Planar is generally considered an excellent lens, I bet something was wrong with the 2.8F. Bad coatings, haze, alignment? There are even cases where lens elements have been swapped by people trying to hide problems, leading to mismatched sets and such.
I've had mediocre Tessars on a Rolleiflex, and excellent Xenars. Lumaxars on a Yashica that were great.
And then there is the 2.8 Xenotar on a Rolleiflex C. Its look is fantastic for me. If I could only figure out how to carry it everywhere without worry, it's the one camera I would use.
I've used a Bronica ETRSi with a 50 MC, 75 EII, and 105 MC(non-macro). All were very good. None made me say that the lenses were something special, but I never felt as if they let me down.
I've had a few Autocords. Yes, sample variation is an issue. A couple have been wonderful, close to the Xenotar. A couple have been very good. Equal or better than the Bronicas. The focus alignment of the Minolta camera is much stronger than Yashica or Rollei. So the odds of getting a good lens at the least is much better.
I can't say for certain why I sold the Bronica setup. TLRs and I get along. So maybe I didn't give the Bronica lenses a chance? Maybe this is part of it for the OP- the Hassy gives him a look with the mirror slap, and the Minolta does it without the slap, so why hold on to the Bronica?