How is the Appel thing bad? Teams do this all the time. Another stupid unwritten rule thing. It's like these guys are not even adults sometimes.
Actually, I don't think teams do that very often at all. I certainly don't remember any Twin minor leaguer coming up to Target Field (except right after they sign and do the post draft media swing). And I also don't think it would've gone over that well at Twins Daily if the Twins had drafted Appel, saw him absolutely suck at A ball and then promote him anyway and give him a pitching session at TF. I suspect some people would find a way to ****** about that.
One of the Astros beat writer tweeted a lot more about this. Basically, players on the ML team think that the FO isn't concerned about the ML team at all. The Springer signing fiasco left a bad taste in some players mouth (Springer was offered a team friendly contract, didn't take it and was sent to AAA instead). So, yeah, in one sense it doesn't matter that Appel threw a bullpen session and nothing will happen b/c of it. On the other side, it's somewhat similar to the Joe Mauer bi-lateral leg crap when players were complaining about Joe. There is a sense of entitlement that a player is getting - in Joe's case, he at least had a track record. Appel is not viewed as warmly.