it would be nice to do a trade for Iggy, but it may not be the best thing for the team. chemistry is extremely important as we saw last year.
the way Butler plays, he reminds me a lot of Stackhouse, someone who isnt what they used to be, but can still explode for 20 or 30 from time to time when they feel motivated, or their jumper is falling. he may be best suited to come off the bench, and play against opposing 2nd teamers to be more effective. If I were Carlisle, I would keep starting Terry at SG (sometimes Stevenson depending on the defensive matchup though), and Marion at SF. Roddy, Butler, and Haywood should be the main bench rotation.