It depends what you mean by 'Championship standard'. Based on this season's performances, I think you could make a case that Ralls, Hoilett when he can be bothered and possibly Tomlin are good enough to finish in the top 6. The majority of the squad is pretty mediocre, but probably not so bad that they will get dragged into a relegation battle. There are a few players who are clearly not up to it at this level.