The whole subset on this discussion is a simple matter of organizational politics. All businesses and religions have them.
In JW land, you have to be pretty secure to disagree with a CO, and then, handle it the right way. (i.e. don't ever come across as not liking the CO, the BOE, etc. Don't make it seem personal.)
In most cases, there needs to be unanimous agreement on appointments and deletions. Few fights based on principle occur, because most elders (who were smart politically and thats how they became elders in the first place) know that it simply isn't worth it in the long run. If you get a reputation, or if your cong BOE gets a reputation, that is awfully hard to shed. And a CO with an agenda against you is a mighty major pain in the @$$. Don't start fights you can't win is something that has been working within the walls of JW's for over 100 years now. (well, except that whole 1914 thing..... )