Spock's Brain was really hokey. He has no brain, yet McCoy could make him walk like a robot including ratcheting mechanical noises...
Plato's Stepchildren was also hokey in the way Spock and Kirk were forced to act under Parmesan's command. Hard to watch.
Keeping with the hokey theme, I, Mudd (not on OP's list) was hokey as well. The "whistling finger" phasers were enough to make me laugh, and not in a good way.
Like I said most of the mentioned episodes were mediocre. A schism between the sexes would have been an interesting idea to explore without the nonsense about Spock. I don't know how much 1960's television standards and practices played into the final product of Spock's Brain. Maybe it could have been done along the lines of Bread and Circuses but then again the idea would have been stale for SB. Very little meat on the bone for Plato's Stepchildren. We had already seen other examples of "absolute power corrupts absolutely" with ST before PS.