I think going 433 with a proper "sitter" in front with two high energy mids either side will help massively.
I don't want to give up on Richards at CB but he clearly looks like a RB playing CB. I guess you can give him time but there comes a point where Sherwodd will have to reevaluate this if its just not working, weather Richards then throws a wobbler is up to him.
Being told he'll be CB was a huge factor in him joining us,needs an older head next to him but that makes Clark being dropped.