Therin of Andor wrote:
but ST III was quite appreciated in its day.
Exactly. I still have, somewhere, a few newspaper movie reviews which favored Trek III over II. Saying TWOK "pads, rather than fills, the wide screen" and that TSFS caught the flavor of the TV series more. "Leave it to Lenoard Nimoy to really understand the characters."
TSFS's fall from grace always felt like "guilt by association" because of the odd-numbered thing.