Thank you for this Mark!
1) Good point, which is already on our todo. So it will be done for one of the next alpha updates. (Two ways of stamping: One as now, and one which keeps the selection)
2) Are you aware that you can mark a drawing as “key” (just hit K when on it) – and then set the lighttable to only show keys. I would guess that this is actually kind of what you are asking. Would that work for you?