They can fix it with a few tweaks. The problem they've got is at least 14 clubs will vote against those few tweaks so they'll get thrown out anyway which means they'll have to either remove the entire rules or get sued again this time by multiple clubs.
They might think they can fix it with a few tweaks, but they would be foolish to try this. So far:
- Leicester escaped sanction because of poorly drafted rules when their legal team found a loophole
- Everton and Forest both successfully appealed sanctions
- Chelsea are making a mockery of the rules by selling off assets
- Chelsea have hidden numerous illegal activities from them
- Liverpool, Arsenal and others are benefiting from low interest loans
- Chelsea and others are trading youth players in order to circumvent FFP
- United are given allowances that no other club has been allowed
- their rules have been declared illegal
- they are rumoured to have allowed one of their members to draw up some of their rule changes
A few tweaks ain't going to fix this shambles. They need some proper legal experts reviewing the whole rule book. If they think there is a quick fix, it proves more than anything that they need someone overseeing them - a regulator.