Normally when I play my Sims game, it is a Legacy game.. in fact, it is the Pinstarr version. So when I play my legacy games, I have no cheats, mods, hacks.. etc.. But now that my legacy family is...
(this is only coming from when I've used the mod, so it might be different for you) MCCC is really an optional thing, so no, it shouldn't affect your game. I'm pretty sure it doesn't command itself to do things like wickedwhims might. If you're seriously worried, I'd just take the entire mod out whenever you feel like playing your Legacy Game.
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