I never understood any basis for a grievance on this service time issue. It is pretty clear cut in the agreement they are operating under.
Certainly it is up to the organization to say who goes on the active roster and who does not. I do not think this can or should be questioned, other by fans on message boards.
I remember many saying Howard and Utley were kept at AAA too long, but who is to say if those extra games at AAA didn't make their early major league production better than it would have been in an earlier call up? Clearly, while both Howard and Bohm may be ready for major league play, neither had a great deal of AAA time. Before all the disruption to the season, I felt both should get one to two months of play at AAA, and then, based on how they were doing, I would have considered a call up to the bigs.