Not usually the manager that does contract negotiations though is it? He’s told the club who he wants to keep so it’s up to them now, best of luck.
During his open-top bus tour interview with Ollie Turner, Danny Whitehall alluded to on field position and style of play sometimes being a factor in negotiations. So what if some sort of scenario arose where a player was offered something but didn’t want to accept due to those things? Yes, no doubt it’ll be down to Ian and George to sort the money and terms side of the contracts, but you’d expect Butler’s input as part of the bigger picture.