I guess it just seems fair to me that if the leader had the chance to win doubled gammons pre Crawford, the trailer should have a chance to do the same post-Crawford. Note that neither side has to face a recube to four, which may have been the way the leader built up her lead in the first place.
As for Jacoby, I already follow Bob's advice and almost never play using it. And I have no problem finding opponents, at least on-line. I rarely play in person.
My issue with Jacoby is that almost all the reference positions are money/Jacoby and while Jacoby usually makes no difference it's a wrinkle that makes the result less applicable to general play. (ie match play or money play once the cube has turned.) Lately, some commenters have been posting positions as Unlimited without jacoby (e.g. Tim Chow) as the better 'plain vanilla' scenario. I hope this trend continues and Jacoby rule goes the way of the Holland rule.
Having to learn a new MET is not an argument against changing. It may not be "fair" to force the trailer to win the match without the cube but my point is that it isn't fair to hand him one or points with which to make up the deficit either. The trailer can still win gammons of course, so he doesn't have to win all singles. Jacoby isn't part of the rules of bg, it is just a convention for money play. You don't ever have to play it, but you might find it difficult to find opponents.