The whole midfield needs a refit, certainly including Fleck, for better more athletic, creative and technical footballers. While Fleck and Norwood I'm sure would be OK next season at Championship level, we know full well they aren't capable of being relied upon in the league above. That doesn't mean Fleck and Norwood aren't needed but they shouldn't be seen as first team starters. Given some of the midfielders available on a free, some decent options who are maybe a season or two away in the youth ranks and the fact we have 5 loans next season we should be looking to overhaul it and start to build the new iteration starting next summer.
Generally speaking, if the new manager keeps the formation, or a small variation on it, then the defence and forward line is fine, just needing a tweak or replacements for anyone sold.