Agreed. Tyner sounds like he has already checked out on that record (Alice was a much better fit by then) and Sanders' work with Coltrane (except for 'Meditations') has always been totally lost on me. And I fast forward through any bass or drums solos. Never have really "gotten" Ali, but Elvin Jones also was not right anymore for where Trane was heading. Can't imagine that Tyner or Jones particularly cared for what Sanders was doing there, given what their own records of the next few years were like. But Coltrane himself is brilliant and challenging during that time.
"Om" has always struck me as a bad acid trip which should have stayed in the can.