Suarez has been offered a very lucrative deal to stay, Alberto has gone on record saying his preferred position is striker, Sturridge has been unlucky this season becuase Roy played him with an existing niggle, Aspas has been injured so hasn't had the chance to show his worth yet, I appreciate...
I'd say there is a big difference between stepping up from League One to the Championship(with Crystal Palace)expecting mediocrity, and stepping from The Championship to the very top end of the Premier League(with Liverpool)with fans expecting to be in the Champions League.