A piece of drywalls strength is in the paper. Remove that and there is nothing holding the gypsum together. If you take the paper off, skimming over top of it is a temporary fix, it will crack eventually. Are the joints already taped and coated? any pictures? any damage from the glue being ripped off? How much board is there?
I did a basement about a year and a half with the some thing, owner didnt want to pay for it to be torn down or anything put over top. I coated all the flats like butts, lvl 5'd all the walls. Paint went on nice and i called it a job well done.
Use a heavy primer, it sticks to pretty much anything and covers alot of imperfections.
P.s any contractor who would mention this idea is clearly a cowboy, and should be avoided. Seriously... paperless drywall, doesnt make any sense.