They will probably be able to flip him for the same type of prospects they gave up for him. He isn't some unknown quantify about to break out and become a star. He is more likely to be hurt and post 0 WAR as he is to be great and post 3 WAR.
He's 30 years old. In 2015 he pitched 130 IP at less than 2.5 ERA. If he put up his FIP from that year, he's a lefty veteran on a half season deal having a good season. He can get a return better to John Gant easily.. All John Gant cost was Kelly.
If he bombs out, you gave up Chris Ellis and John Gant and a guy in A who has no power, doesn't walk, and plays a weak 2B. who cares?
After trading Gant, Whalen, Ellis, Povse -- the braves still have Blair, Wisler, Jenkins, Weigel, Sims and a cast other characters with equal or better expectations at the AAA level probably.
Honestly, they needed to clear room of mediocre fifth starter/swing men if nothing else.
I don't really understand what you think the Braves should be doing. you complain every time they make a signing that you perceive the average fan will view as a win now move, despite the fact that they've given up nothing of value, have not tied themselves into any long term commitments and in fact the acquisitions on balance do make it more likely they will win.
Compare that to your love for three years of Jason Castro at a premium. That's what I call making a dumb move trying to go for something and instead hampering yourself with an overpaid backup catcher who kind of sucks.
All this is fine. They are taking some shots at putting a decent team on the field for fans, at relatively low cost, while also putting themselves into some spots to acquire more young talent that might help during future windows. None of these deals are supposed to be strokes of genius. They are just moving around assets trying to be respectable while assembling a winning team for the future.
And it ain't going to be Whalen, Gant, Ellis that turned them around.
Yes, they might win fewer than 80 games next year. So what?