The thing I do not understand it why Page decided to put digital into the signal path, very disappointing.
I take it you mean why didn't he use the original analogue tapes rather than using digital files/digital tape to create a new master. Possibly because it is a monumental task to pull the analogue sources and who knows what condition the tapes are in, or if they are even archived. Or the reason could be budget constraints.
We were lead to believe that "Mothership" was to be a great remaster supervised by Jimmy Page, but was only a remix from digital masters. I'll give them credit for eliminating tape hiss and using minimal compression, but in no way sounded like an original LZ recording; no bass slam, no soul.