Actually, it was quite complicated and took some finesse to make it work. It wasn't as simple as flipping a switch. As we mentioned in other threads, this was slowly implemented in layers to ensure it went smoothly.
Breeding Gemstone Dragons isn't a replacement for disparity. We're still working on it. Breeding Gemstones is something we were able to work out to bring Gemstone Dragons to everyone right now, so we couldn't pass it up. We hope you're enjoying it. ^_^