I'd keep Rafa for one more season.
That said no matter who is manager will make no difference whilst the clowns own the club.
Again a valid point made earlier, that if we spend £50m (and that is a MASSIVE if) and the likes of City, Utd, Chelsea, Spurs and Villa massively outspend us again, in reality we have an uphill struggle. We can blame the manager of course but he- no matter who he is- is not going to bring home the Premiership.
Thats said the first team, when we're fully fit, is excellent and can compete at the top level, the issue is the players that come into the squad when we have injuries.