Very nice article and observations.
Fields immediately became less comfortable with the offense once Melo was thrown in. Melo tends to take up a lot of the same space that Fields once occupied. This is especially true with rebounding.
I really hate our ISO game and one on one basketball only works during the regular season. Once the playoffs come around, it becomes harder and harder to get by without exhausting yourself each game if you don't play as a team (Miami vs Dallas). A guy like Fields is designed to compliment and make your team better. Not sit around the 3 point line and basically nothing else.