To be real... I DON'T think Amare will be in NY the last year of his contract unless the Knicks appear to be contenders with him. Otherwise he's the first to go...
But I think because of those same points you made.... these moves are to get the most out Melo AND Amare.
1.)Create more shots, because there clearly weren't enough for everyone last year
2.) Stack the defense, because Melo can play D, but doesn't do it consistently... And Amare just doesn't
3.) Get point guards who know how to get people shots... because even if there are more shots available, you need a player who is gonna give it to the right players to take those shots.
And honestly... how many more shots can Melo take? That nikka has no conscience. AT ALL. Which can be good or bad