I like how this argument has gone into two extreme corners with nothing in between. Acquiring a guy like Sabathia was not a marginal improvement. Beyond the on-field performance, that trade energized both the team and the fan base. So both are right in a way. Yes, a "big" move may not pay off but it can have more than a marginal affect on the team.
You do not have to trade the cream of the crop prospects either to improve the team. The talent level of the system is deep enough that there are going to be enticing prospects that are not Made or Pratt. Never mind that none of use really knows how the organization really views any given prospect. They may not be as high on Pratt as the industry is. Its not a question of trading the best prospects or doing nothing.
I do think the FO has earned a considerable amount of leeway in terms of the decisions they make but they are not mistake free. I will never agree with any notion that suggest any entity should go without question. I think, if being honest, the majority of the board scratched their collective heads at the Priester trade but that has, without a doubt, been a massive (dare say more than marginal) acquisition without which, the team would not be here. Likewise, the Hoskins signing was near universally lauded and I don't think that has lived up to the expectations. A "big" move is not equal al to making a move for a name. Likewise, keeping all our prospects or making small moves doesn't guarantee anything either as we've learned through the years.
I also think there is room to expect more from the organization as a whole. The whole bites at the apple versus going or it arguments are both valid and I suspect you can find examples of both philosophies working out at times. Personally, I want a World Series. Full stop. But I also see what the org is doing and I'm not sure right now is the time. I think they are going to be better positioned to make that move in the next several years. I think both sides have an argument though and calling anyone out anyone for being on either side is just lazy. We can agree to disagree.