I'd suggest Simmons. Also god forbid he gets injured during one of his arby years, then he will just be cut. I mean I haven't one good argument to not keep him down a few more weeks to avoid this scenario.
That's the thing. I can't think of one outcome that works in the favor of the Braves team long term by bringing Blair up now.
Even if he would have won today, what would it mean? Nothing in the long term. One Blair doesn't make this team respectable no matter how good he pitches, this year. The supporting cast is too bad.
I guess you could argue that Blair, at the end of his control and arby years, after establishing himself as a dominant ML pitcher, is going to say "You know, the Braves brought me up and let me be a super two, start my clock and allowed me to make millions more than I would have when they didn't have to. Therefore, I am going to re-sign with the Braves at below market value." I just don't see that as likely.
And that's assuming that he pitches well, doesn't get hurt, isn't misused by Fredie, and doesn't lose confidence playing on a AAAA team that faces ML teams every day.
Blair isn't the guy you use, even if you "need" a starter. He's part of the future (we all hope). Weber is the guy you use today if you have to.