IF this is an 'expansion' then the ratio will have to go, just like it did during the US expansion all those years ago. The US labour laws won't accept X number of foreigners. Canadian teams with ratio rules would be at a huge disadvantage, so the ratio would have to go in Canada too.
Field size isn't as big a deal to me as it is to many others. If the US stadiums can't fit a CFL sized field, then that would be something I'd be willing to give up to save the CFL. I wouldn't even care if different fields were different sizes. Basically, as close to the CFL size as possible and I'm happy.
What I don't want to give up is the 3 downs for 10 yards, the 2 point conversions, the 'halo' instead of the 'wave the arms, don't hit me', the Kick Off rules, etc. Those are the things that make the CFL different and special to me.