Anything less than a mid lottery pick or a young rising SF (like a Jeff Green or Paul George) wouldn't be worth trading Amir, considering Amir himself is finally making real improvements and is arguably our best and most well rounded player at the age of 23. His value likely hasn't recovered yet after the ridicule his contract received in the offseason, so we'd be selling low.
He is good, but well rounded, he is not. Foul prone, inconsistent defense, IQ lapses, no outside game, doesn't take it hard enough to the rim, etc etc etc. These are all things that big ed, in his rookie year, is showing better skill levels at.