I agree; I probably shouldn't have deleted that node, and I'm pretty sure I ended up keeping most other stops / platform areas (contra public_transport=stop_position's which I did consistently remove) in later edits. 

They'll mostly be served by the bus replacements, so can be converted into bus stops while maintaining the history. In other cases, they'll probably still be marked by shelters or other infrastructure, even if unused and can use your proposed tagging. 

I'll have a try at resurrecting that later this evening, if you don't beat me to it.