I appreciate the sentiment here and it's certainly an interesting problem, but Cloudflare is not particularly interested in bypassing government actions taken against them, and I would advise seeking out your own solutions. Cloudflare isn't going to make or use a new protocol specifically for evading DPI, and if their new protocol gets blocked they're not going to partake in the cat and mouse game that ensues
A hacker performing a mitm on these current protocols wouldn't be able to see any of the actual data, just the SNI (if the protocol has one, which Wireguard does not)
That is true but doesn't relate to the specific issue being discussed, those actions can be performed regardless of the protocol being used for outgoing communications