I have had this discussion with my current UK airline too.
We currently correct everything below the temp corrected MSA, for all approaches. In my previous airline, we did not correct anything between and including the FAF - DA on a Baro-VNAV approach. I showed the AMC to the company who replied that they were within their right to be more conservative and correct anyway - I disagreed as it explicitly states that we should not do it - but was over-ruled.
I still disagree - but nonetheless, I suppose this shows how straight forward and unified this all is.