Good post.
The thing is, if you preach "go for it," "let's see what the kids got," "bring him up, it makes no difference to the long run since it's obvious that the Braves will extent him," then you really can't lose because you can always fall back to "needing some excitement" or "just being a fan" if he fails or if the move backfires in any way. If he does great, then you look like a genius and anyone who went the other way can't even defend their position without it coming off as sour grapes.
If you say "this is a bad idea," or "it makes no difference to this season and is a bad gamble for the long run" or "he's not ready, even according to John Hart" the only way you come off as correct is if the player fails or bad things happen and even then you lose as a fan because you don't want the player to fail. So even if you win the argument you lose in the end, unless your big thing is E Cred and that's all you really care about (which isn't me).
I've said very little either way for a while because there's no way I can win the argument - if he succeeds wildly, I was wrong. If he fails, I'm a dick for hoping he fails so I can be right (or so the narrative would go). I said early and will say again that anything he does, good or bad, is a SSS that may or may not mean a thing and we won't even know what that SSS ultimately is until the end of the season.
For the record, I hope he succeeds wildly -ROY, batting titles, gold gloves, All Star appearances, retired number, all of it for the Atlanta Braves.
But I still say that it is a dumb move regardless of his performance or lack of performance because his success or lack of success means nothing to this year's team and very little to next years team (one could argue that if he succeeds wildly this year it will build a foundation for him next year which might be true). But there can be no argument that he didn't have to go on the 40 man until he was called up and any time spent at the ML level is time that counts against control time for the team and speeds the arrival of arbitration and ultimately FA. It's speculation both ways as to whether any of that will ultimately make any difference either way.