Thanks - Seems there are a few with the same sentiments.
I really like ggvis and clearly others do too, but there does seem to be an obdurate - refusal to even say NO ! (which is always OK from developers of an open-source solution
A great many people (myself included) really appreciate what the RStudio team are doing generally, and @hadley in particular but this attitude increasingly whiffs of don't give a damn.
There may be good reasons, and there may be other priorities - but there is uncertainty which could be clarified.