We've started using RV with greater anger and I have been trying to resolve the best way to make the colour management as straight forward as possible.
I believe that our-of-the-box the user must specify input and output spaces and/or transforms. The OCIO plugin will look for a tag in the image filename to determine the colour conversion needed. This seems at first glance a fairly decent way to do it.
Bearing in mind the idea is to review lots of different media, including images with ICC profiles.
Sorry I realise I put this in the SG forum instead of the RV one. Please delete as you wish.