I was thinking it would be fun if you could get an upgrade card that would give you the ability to temporarily disable upgrade cards you had already bought. For instance, I love the new barnacle and jellisac speed harvest upgrade cards but it would be nice to disable them when going on a barnacle and / or jellisac party. As it would be quite difficult to all get the same jellisac if it goes in one second. Or to be able to disable Master assembler and Master exploder for when you want to have pit stop races. Maybe there could be a 'Disable Upgrade' card which is a one use card similar to the get out of hell cards or the reshuffle cards. Applying it could disable an upgrade for one game day or an hour, or something like that