There seem to be two schools of thought.
One is that for a rebuilding team the young players should play over the veterans. They should be "developed" and have "upside".
The other is that the veterans give the team a better chance of winning (the #1 priority right?). Also, benching a respected and still productive vet lIke a Chandler would be somewhat disrespectful. He deserves to play somewhere. If not with Phoenix then somewhere else. Trade him, buy him out, whatever.
I dont know about the whole "showcase" thing. Teams aren't stupid. They know who Chandler and Monroe are.