I don't have a specific dicussion about hs, it was mostly in changset comments which I did not track. People started by adding the separated paths at each intersections where there was concrete separation and then merged to the road in-betwen but it created a mess so we decided to just put a separated way all the way.  Personnaly, I don't really care if the road cycleway tags are precise and complete, but someone will redrwa it back as this has been the case in the recent years, so I think we should keep them separated to reduce back and fourth changes. It says in the official wiki taht in the US, it is usual to map the cycleway separated even when there are only flexposts as separators. If you look on the trackoage, it says that it can be alternatively be drawned separately, and track can be used when the separation is only a parking lane:
https://wiki.openstreetmap.org/wiki/Tag:cycleway%3Dtrack
so I don't see the problem here, since the REV is built as a separate, protected lane anyway.