Actually if one want’s to truly understand Rav Gedaliah Nadel’s view’s itis very relevent.
Rav Gedaliah hald that the Rambam learnt different part’s of Chazal differently there were aspect’s of science that Chazal had in a Mesorah and aspects that were not.
That is one of the reason’s Rav Gedaliah zt”l did not discuss his approach to the Ramabam in a public forum since he learnt that the Rambam had a highly nuanced position which entailed taking a different approach to different Mamorim of Chazal based on various factor’s.
Basically the reason that Rav GEdaliah took this position is that irrelevent as to whether or not the Rambam learnt Kabbolah there are a great many basic question’s on various position’s of the Rambam from a textual standpoint that are asked by him again since the Ramban in the beginning of VaYeira or RSRH in Letter 18 regarding the Rambam’s statment on Korbonos for ex.
In addition there are various seemingly contradictory statement’s that are semmingly made by the Rambam that need to be resolved.
Rav Gedaliah (again he was a rare genius and talmid chochom who the Stiepler himself used as a Rov after the petirah of the Chazon ISh) was one of the only people capable of going through Chumash and Shas and providing a way to resolve these questions. Doing so like any sugya required taking a nuanced and highly analytical approach.
Which again is completley different then Slifkin’s approach since Slifkin feel’s Chazal only knew the science of thier time period.
Which once again is typical of Slifkin since he had a couple of conversation’s with Rav Gedaliah towards the end of Rav Gedaliah’s life when Rav Gedaliah was already bedridden and only publicized what he claims Rav Gedaliah told him after Rav Gedaliah’s death.