To everyone asking about an update;
If I ever pickup the resource pack again it won't be for some time. Since I started this project I've become a full time game developer, all of my time is currently invested in working on my flagship game Retro-Pixel Castles (It's currently in Early Access on Steam) and it would be a huge disservice to them if I reallocated that time to working on the resource pack. After all, they're all paying gamers/fans and deserve to have a completed game!
I have always kept this pack in the back of my mind though, I just simply don't have time to update it anymore. But who knows what the future holds after RPC's development is complete.