Yeah, I think the concern about MF lenses not supporting the 80mp backs was a bit overblown - a bit of the sky is falling. Going from 22 to 80 is really only just double the linear resolution in each direction.
Out of curiousity, I did a quick test shooting a line chart with my CF 528 which shoots a 22mp multishot file and a 88mp multishot file (in microstep mode). The 88mp file got exactly double the number of line pairs that it got at 22 which to me at least indicated that there was no loss of resolving power of the lens going to 88mp and therefore I concluded the lens would support even more pixels. This was with a 48x36mm chip so actually the AFi-ii 12 (same as IQ 180) at 53x41mm is not taxing the lenses as much since it has only 80mp with a larger area.
Some of the RZ lenses look quite good as well. I have used my AFi-ii 7 on the RZ but not fitted my AFi-ii 12 yet so can't say how good, but a few seem to be very good.