A rules remix would be great, especially if you can toggle it. Why wouldn't anybody want that sort of extra included? Seems like a great idea. The game will sell plenty well based on everything the original had to offer, but any added content would be nice for those of us that are a bit tired of what the original has to offer.
If this is what is actually happening, and they pull it off well, it would be real nice to see other games get the same treatment that CGC releases. It opens up options a bit more as well, because some games have good layouts that could really be elevated by better rules. It might make more games worth revisiting for a release.