This is a fantastic idea and I would love to try it. Am I missing something? I don't have a google account and I’m on chess.com not lichess - how do I make an account?
Yeah I find the estimate of the radar chart to be quite accurate. I scanned a range of players from beginners, to pros like magnus and hikaru and myself who is in between (2200 elo) and it gets the rating estimates correct. So I think if we work on all the fields it's suggesting we can definitely climb!