This is absolutly something on my long term roadmap. I’m thinking the ESP32 is the ideal target. There is a port of GRBL to the ESP32 here which looks great and is actively maintained. The dream would be a modified version of Webcontrol running directly on the ESP32. I’ve been working on a redesigned controller board which you can read about here:
Progress is slow right now because Create is my main focus, but I would absolutely love any help that anyone can offer.