From what the owner of the local shop told me is that the rationale Nike not wanting to put the branding on ALL the cw's is because they want the average joe or jane pick up the shoe who, may not even play tennis, but ,buy and wear the shoe causally. For the tennis head, we have our favorite player(s) and will buy specifically that player kit. So, that's why nike went all generic and wants to expand the models to the general consumers. You guys notice that Vika or Masha no longer wear women specific shoes. They either wear vapors or LBs. Li na rocks the old cages and Serena wears her old models.
Also, the bidding war is on for Andy Murray. Nike knows Fed is in his twilight ( yeah, it must suck to be top 3 in the world) Nadal still has some years left. So, nike wants to keep another top tener in their stable. Dudes like Del Po and harrison and lower tier players will eventually get cut. Grigor will continue to be a face and likely be the 3rd nike player.