OO646,
If one wants to understand the Moreh NEvuchim in anextremly literal sense then it’s not that the Rambam was aDa’as Yuchid, it’s that all the Rishonim very forcefull argued and condemned the approach of Moreh Nevuchim including Rabbeinu Yonah, The Rashba, The Rivash,The Ramban, the Mahral and the achronim till out times.
The basis for the forceful condemnation of the Moreh Nevuchim is because the “metzius”was that the Rambam did not learn Kabbolah (See the Chida in Shem HaGedolim for an interesting reason why) and as such was limited in explaining certain concepts of Chazal.
Based on this the Rishonim and Achronim in virtual unison forcefully condemned the approach taken (Again see the last of The Nineteen Letters of Rav Shamshon R. Hirsh zt”l for an extremly forceful essay against Moreh Nevuchim.
As such many Gedolim have stated that Slifkin is basically taking an approach that was excoriated by the Gedolei Yisroel for over 1000 plus years as being “outside the pale” See Ramban on Chumash Parshas VaYeira for ex.) and stating it should be given legitamcy.