I was testing the last changes and I've seen two problems:
The zebra/focus peaking is misaligned at image review mode (immediately after shooting). Even if the image is displayed with canon histogram and photo info the orverlay covers all the screen (not only the thumbnail)

Using my CZ Distagon 28/2 (C/Y mount + adapter + AF chip) I have ~ -3 stops at LV screen compared to the actual photo, so zebras, histogram and image references are useless. That's for photo, Movie mode (manual, same parameters) LV looks correct.
I've tested also with and old 28-80 USM without problems with LV (overlay problem persists). I don't have my L lenses here and the other two Zeiss primes for testing now