I can understand this, but we really need to forget about where Haseley (or Moniak, or any player) was drafted...forget about what scouts thought four or five years ago...and focus on what the players have actually done, actually shown. A draft slot, a years-old scouting evaluation... these are sunk costs, just as a struggling veteran's guaranteed salary is a sunk cost. All that matters is what the player is likely to be able to contribute, now and in the future. A five-year-old evaluation of an amateur player is not worthless, per se, but it has only rather limited weight, against that player's performance in the ensuing five years, in estimating what that player is likely to do going forward.
Regarding Moniak vs. Haseley, I don't know how "good" they might feel about Moniak at this point, but it's worth remembering that, notwithstanding his being drafted a year before Haseley, he is two full years younger than Haseley. At this point, he has more growth potential, so I can understand trading Haseley rather than Moniak if they decided they needed to move one of them.
Moore I know little about. The White Sox sent him to the AFL last autumn, so I have to think they at least thought there was something there, and presumably the Phils people saw him pitch there. His numbers weren't particularly good, but in the context of that league, I don't know?