Out of the four immunity abilities proposed, I think Motor Drive would best fulfill the concept, simply because of the potential for CAP28 to switch in and gain a speed boost. Volt Switch has gone mostly neglected in our attempts to prevent pivoting except for our typing. Yet, that resistance does nothing to discourage the use of Volt Switch, which will still enable the opponent to pivot to a check that forces CAP28 out, failing the concept.
Motor Drive, or even the threat of Motor Drive before CAP28's ability has been revealed, will be able to prevent Volt Switch from being used in the first place, which is much more satisfactory to the concept than switching into a Volt Switch and getting pivoted on, resistance or no. I believe Motor Drive does this better than the other immunity abilities because the consequences are much worse for the Volt Switch user. Many of the mons listed under Pressure relationships are mutual OHKOs depending on who moves first, so giving CAP28 a Speed boost is a situation everyone who doesn't have a hard counter will try to avoid.
Thus, I think Motor Drive complements Neutralizing Gas well in fulfilling the concept, by enabling even NGas sets to exert a psychological pressure against using Volt Switch until the set is revealed, and enabling actual Motor Drive sets to make Volt Switch an extremely risky move for the entire game.
Motor Drive, or even the threat of Motor Drive before CAP28's ability has been revealed, will be able to prevent Volt Switch from being used in the first place, which is much more satisfactory to the concept than switching into a Volt Switch and getting pivoted on, resistance or no. I believe Motor Drive does this better than the other immunity abilities because the consequences are much worse for the Volt Switch user. Many of the mons listed under Pressure relationships are mutual OHKOs depending on who moves first, so giving CAP28 a Speed boost is a situation everyone who doesn't have a hard counter will try to avoid.
Thus, I think Motor Drive complements Neutralizing Gas well in fulfilling the concept, by enabling even NGas sets to exert a psychological pressure against using Volt Switch until the set is revealed, and enabling actual Motor Drive sets to make Volt Switch an extremely risky move for the entire game.