I think though that this issue is shared with both blad and bronica systems though based off of their design. I find that with slower more telephoto lenses the split image in the fresnel blacks out more than with the 2.8. I like narrow DOF and BOKEH, the 80mm 2.8 is great but I believe that around that focal length the 80mm is the fastest lens available. My ONLY gripe with the Bronica system is that the lenses are slow. I don't worry about losing sharpness wide open. Interpret that as you please but even the standard P lens I have has given me very impressive results. I don't know the lines per mm of the bronica lenses but I know that the Zeiss lenses of the blad are amongst the highest quality glass out there.

I haven't seen many people shooting blads with grips so my general impression is that with one, the SQ can be a faster camera. Combine that with a prism and it handles like a big 35mm and is easy to catch quick candids if you're shooting street. I use a grip with mine also and it makes throwing this camera around much easier. Im not sure what hasselblad is like for backs or accessories but it seems the SQ system has a lot of neat add ons, like 220, 645, 35mmW, and standard 35mm backs. You can set MLU for one shot, or continuous which is neat if you are shooting something that requires constant MLU between shots. I would assume this falls under all of the SQ series. I've never used a blad before so I can't give a direct comparison but I can tell you about the SQ.

Bronica sq a prism finder