I doubt that there was "never" a roadmap. Anyhow, it would be of great help for me as a customer to know, if the company plans on supporting the EF format in the long term. Because this will have a great influence in my buying descision, now and in the future, and affects my brand loyalty. The question what is missing from the EF line is not as important as what should be improved, at least in my opinion. Some lenses don't performe as well on the 5dSR as on a lower MP cameras, 24mm II for example, for which I took the Zeiss Milvus 25 1.4 instead. The TS lenses 17mm and 24mm could benefit also from a refresh, as well as the 50 1.2. All of which are already out there, but will get their refreshments in the R-line sooner or later I suppose. But, as I said, nobody knows, because there is a lack of communication thereof which leaves a big question mark.