>an untidy, cruft-filled personal .vimrc

Yeah, that particular itch is also one I'm scratching with this project - the .vimrc/init.vim quickly become cluttered.

>any chance switching to a Lua implemention

I'm more than open to it honestly. Initially I wanted to flesh out a bit of what was achievable, and since a lot of the layers mainly consist of configuring plugins and key mappings viml seemed easy to start with.

It's definitely something I'm looking into though :)