CKM could still get his free agents unless they wouldn't be willing to wait until the cap space created by releasing Carr cleared in June. I don't know how often that happens with top tier free agents, but we shouldn't be bringing those in anyway. Key guys that want to play for CKM could come to an agreement with the team and should be fine with it. Neither side would back out because of how it would look for the team and the agent in future negotiations.
Plus, the period of time between the draft and June allow us to know for sure what else we needed to go into the season with a complete roster. And a clipboard holding vet QB can easliy be had in June.