Would be nice to see a short screencast or at least a screenshot giving a sense of the workflow this enables (or maybe I'm missing it on the site -- looking at it on mobile).
I just recently dropped vim and my existing vim config (which took me forever to get autocomplete correctly), for nvim 0.5 with builtin lsp. The effort to get nvim lsp configured vs. any of a handful of autocomplete plugins I’d tried using previously in vim was night and day. Nvim is a fantastic project and LunarVim looks like a great complement.
(edit: it doesn't blow away your existing config, and it has some very respectable config documentation)