Do any reshuffling at your own risk. If french isn't your first language, it's ludicrous to pretend like it is, to lower your CRS for the french stream. In my mind that's 100% misrepresentation. Have fun living in fear of your app getting rejected and you being banned for 5 years or whatever. Or evn if you misrepresent and get your CoPR, good luck living in fear of it coming up later and causing you issues with citizenship or having your PR revoked.
It's curious how people with nothing to lose (those who already have ITAs or aren't personally affected by the FSW situation) are always the ones to suggest these bullshit tactics to game the system. If French is your first language, sweet, treat it as such. But putting a CLB 7 as your first language (for example) and a CLB 10 as your second language cannot be justified as being honest.