g; has been more useful for me than this one. It goes to the most recent change location. I edit a little, then move around in the same file for reference or check signatures and then continue editing by going to previous edit location using g;.
I have seen some other language wordles use yellow or green coloring of upper diagonal part when the consonants is right but wrong sound. That could be an approach. See how to at https://solladal.github.io/wordle-tamil/. (I don't think there is translation. But pictures should give the idea)
Totally agree with all your points. I also have a rating little over 2000 USCF. New players tend to over-emphasize on openings. To this day I know only names of about 5 openings. I do not know more than a few moves in them. I have generic replies for most of them.
Majority of the games of new players are decided by some stupid blunder. Blitz games do not help improve this area much. Like you said game reviews and puzzles are best.