Just going through a back-log of things I haven't responded to! Apologies about that.
While I haven't sat down and decided specifically what and won't be in the UI pack at this moment, it will mainly be catering to traditional JRPGs and SRPGs since that's main inspiration for these sets. Don't want to say those things definitely won't make it (because I am listening to what everyone wants!)
But regardless -- at this point I'd recommend hiring a pixel artist since progress on this project is pretty slow at the moment. :(