Henry plays RCB, so when he comes back he is going back to his spot and Newman is returning to his spot at LCB. If you really want Reeves to remain the starter that would mean you don't want Newman to be the starter. And that is plain crazy. Plus, Reeves will still get plenty of playing time when the defense goes nickel and Newman mans the slot position.
There are agendas and then there is just being a pain in the posterior. If you can't watch the games and see that Henry has played at a high level and outplayed Reeves then I don't think you have a clue about football or just like stirring it up. And that is not to say that Reeves has played poorly. He has done well for the 3rd CB on the team, but Henry was easily outshining Reeves.
Also, if Reeves is so darned good then maybe that will put an end to your other agenda that Dallas should have drafted a CB to replace Henry instead of drafting Stanback.