Honestly, I think Lenny could have could have cut a good five minutes out of it without losing anything while greatly improving the pacing.
He did already, at least a couple minutes anyway, that's how it got down to release length.
There was a procession with Spock being carried up the mountain past all these Vulcan extras (Takei got to play one of them) and through the Vulcan Hall of Mystic Bullshit where the art department erected large photographic cutouts of the heads of famous Vulcans.
(I'm sure it must have looked better than it sounds. Well, not entirely sure. Some of the snow covered cactus on Genesis looks like somebody just inverted a tripod or light stand and then threw a fuzzy white blanket over it. SERIOUS art department cheap-outs and creative failures on this one.)