OK, I hope I didn’t do anything too out of bounds here with Google Apps scripts.
I tested them on my own copy. Now we can see the latest review an author wrote and the latest review for a game. The spreadsheet updates every time someone adds something, listing the latest author/review for the public and private forums.
I suspect my code can be improved, but I hope it’s good/useful/fun enough for now. You need to convert a number to the column equivalent, and that’s tricky, but doable.
Victor, if you need to roll this back, I won’t be crushed. But I hope it will be useful in some form.