Roms basically must be based on Moto leaks, so that means no built from source roms. It kind of limits the amount of customizations that the devs can make. Every source rom I have ever used seems to be better than roms based on leaks but that's just my opinion. Also, because it must be based on a leak, once Moto decides to stop making updates for the phone you can no longer upgrade to newer versions of the OS. For instance, there are already GB roms for the OG Droid. There are none for the X or D2 because there have been no Moto leaks of the os upgrades. Basically, the devs can no longer keep your phone relevant with updates which is exactly what Moto wants.