"Crap without him"? Given that he was a 70th-minute-or-so sub on Wednesday, I'd probably argue that fact. Not that I don't like Amani; I think he's been terrific this year.
Crap is the wrong word, but the Stars have struggled without him. For example, look at that match prior to the San Jose match down in Tampa. I think we managed one shot on net? The Stars have had to change their system slightly by not having a big target player like Walker up top.
I forget how many minuted he had last year, but with four goals (I think he has five counting US Open Cup matches), he gets my vote.
Kallman is a strong player, but his improvement was last year. He continues to develop, but Amani is clearly the "most improved."