If Carmen is introduced on longhaul then they'd have to change the MBT days ie. 4 days off after a SIN or NRT, 3 off after a SEA, etc... - in which case I can't see how they could cover all the work! We'd probably end up with more days off, especially on the 777.
While you're on here Lloyd, how about 3 day SFOs/LAXs with 8 days off after (1 day per time zone change)? Sorry, I forgot that you want to have your cake and it eat too.