Your kidding right? Players have no say in a decision being moved up or down unless they have a no movement clause in their contract. Even players on 1 way contracts do not have a choice. If they are sent down they pass through waivers and can be claimed by another team but they do not have a choice in the matter what so ever! A player with a no trade clause is also not exempt from being sent down and again, they have no choice in the matter.
2 way contracts have no choice either and they do not pass through waivers.
Your telling me Redden and Souray were asked if they wanted to be sent down and they agree'd to it?
Waivers are in place to attempt to add a little more parity to the league, protect players with 1 way contracts and also to hold teams accountable.