"Some" confusion here : 

This is Veolia here (former Dalkia - Industrial maintenance in heating) Not Kantine du Canal. 

Kantine du Canal is already mapped  : https://www.openstreetmap.org/node/5421246725 but the building outline is not correct near entrance of metro in Fernand Demets, exact location is in place of https://www.openstreetmap.org/node/4200124554 

Ex hackerspace is here https://www.openstreetmap.org/node/5522483676 and the old position is correct. 

Recy K POI need to be checked ; not sure it's a recycling center, it's the name of the global project and there is micro-activity around there : survey needed for actual situation for this part. (as i remember the project outline going to Birmingham street too)

Urbis down at the moment, so update of building geometry is not posssible. 