There probably is along one reason why i would keep a rotation of wings players who aren't a consistent scoring threat like some of the others mentioned (Rip, Redd, Ginobili, etc.) is in case Bargs turns into a potent second scoring option alongside Bosh. In which we won't need someone on the wing to score 20'ish ppg to keep the pressure off of Bosh and that a Bosh/Bargnani scoring duo will provide tons of opportunities for standstill shooters like Parker and Kapaono. Plus, with Bosh and Bargnani we could hide the weakness of an offensive liability in Moon provided that he provides above-adequate defense.So if you were to ask me would i trade for an all-star like wing at this point? It depends on who we're giving up. But I'm confident enough in Bargnani that we won't need someone like that on perimeter.
However, this doesn't hide the fact that our startings fall pale in comparison to the rest of the league's starting wings. I don't care how you cut it, I would rather have a Jason Richardson/Gerald Wallace tandem rather than a Parker/Moon tandem, simply because the former is so much more better than the latter. And Kevin Martin is so much better than Parker, while Bowen is so much more better than Moon...well you get my drift.
I just draw the line where objectivism ends and homerism begins. Parker being a better shooter/defender than Ginobili (which I would strongly debate both) does not hide the fact that Ginobili is light years ahead of Parker, regardless if Parker is the better shooter and/or defender. Ginobili brings so much more to his team than Parker does. Moon being a rookie and still able to improve does not give reason to hope that he can be better, or at the same level, than Gerald Wallace. What has Moon shown thus far into the season that he can drastically improve his offensive woes? Defensively he is not that good considering how some are claiming he is. I would argue that Parker is better defensively than Moon.
P.S.: We could use somewhat of a spark off the bench in the future. A volume-scorerlike Dixon who can score buckets at a more efficient rate (Travis Outlaw comes to mind
).