Hey @BigScary, haven't seen you in a long time! How about using the WorldGuard API to handle claims? May greatly increase the speed at which you can get the plugin out, as, lets be honest, it needs a rewrite. The new WG 6 does everything you'd ever need to, and I began creating a GP-like plugin using WG 6 because the current GP is such a mess.
Just my 2 cents. But still, great to see you back and hope to see great things!
WG 6 includes support for protection against most, if not all mod actions possible, fast MySQL and flatfile storage, a great API and a whole lot more. I'd really recommend looking into it as a base for GP if you plan to rewrite or port.
Edit: If you are to port/rewrite, I'd also like to see less bloat. For example, dealing with chat, and too many configs. There is no need to have so many, and it only makes the plugin harder/impractical to use, especially if users can create their own dimensions.
If you want any help with the design of the plugin, I'd love to help out. I only say this because of how GP turned out with the new devs, and it is certainly my favourite land protection plugin.