I think Higdon will be one of the ones that has more of a chance of staying out of the likes of Randy, Law etc.. At the end of the day, it depends what offers are on the table for him. He is 29 years old, he has scored over 20 goals this season and is playing in a team that suits his strengths as a striker.
With McCall also signing a new deal, that can only help the likes of Higdon and Humphrey signing for another couple of years.
Players will always move on from the club and we have always got in more than adequate replacements every season (aside from Daley).