They wrote it to cause exactly this scenario, it was not a “clean” memo like the R. one. Despite all their pre-release screeching about the Nunes memo, there was NOTHING in there which was sensitive about any genuine intel “sources and methods” — but Schiffster had written the D. memo in a way to force POTUS to either order a lot of redactions, or to block release entirely, or else to face a lot of criticism for allowing truly sensitive info to be made public.
Imho, your summary is the precise description of what’s going on here.