IMHO the style of ball Porter wants to play is 180 degrees opposite to these two players capabilities. Both would thrive in NY and with Nellie. Shaq can't play the style that Nash and Amare like to play with any consistency.
Nash = no D but is a wonderful open floor PG who struggles in a half court slow down type of game. He is one of the best passers in the game with a very good offensive game. When D'Antoni was there this team was one of the most exciting and entertaining teams I've seen in decades. I just loved to watch them run and gun.
Amare = low BBIQ and suspect D who needs a Nash type of PG to get him the ball on the move and with the proper spacing in order to operate. When that happens you see dunks galore along with open looks all night long. He has a great offensive game and is an unbelievalbe talent but like Nash struggles in the half court game.
This isn't a good match and something has got to give in Phoenix. Either can the half court stuff and run or trade one or both.
Nash brings the least due to age and reoccuring injuries...chronic back.. but the Suns might get something for him.
Amare would bring much more. I'm sure many a GM would take a chance on him. Many GMs over the years seem to have the opinion that "if this particular player played for me in my system he woudld turn around and be better". Doesn't always work but Amare's talent would probably blind many to his faults.
Dude needs to be in a run and gun atmosphere. Frankly what you see from him is what you are going to get from here on out. I really don't see him improving drastically - playing much better D with a higher BBIQ - at all.
Though watching him and Nash play 7 second ball is lots of fun.
