Another player who's development you have written off at 24
My mate is a United supporter and he forces me to watch a fair few games. He's always said that Buttner is awful and I'm inclined to agree. Lacks concentration, defensive ability, marking is poor. He's a decent dribbler and is quite pacey but he has a statistic of hitting only 2 accurate crosses out of 26 or something like that.
He's not a bad player. Just not top level PL quality.