I'll get the negative out of the way first:
Losers:
Braves Offense: This one is the most obvious. Losing Heyward, Justin Upton, and Gattis will be felt obviously. That's potentially at least 50 homers combined between the three.
Frank Wren: Some of the contracts he's given has forced some of these moves (see B.J. Upton). It's not only the contracts. It's also the fact that there have been very few players of impact from the minor leagues. That is probably as much as anything else got him fired.
Bandwagon Fans: If this is indeed a rough season coming up, they'll have to find another team to root for.
Winners:
Braves Minor League System: It needed an influx of players. These deals have done just that. These moves have vaulted the farm system back up in the ranks. Going to be looking forward to watching how these players progress this season.
Program Sales At Turner Field: Fans will probably be buying a bunch of them.
Jose Peraza: If I'm this kid, I'm looking at the make up of the big league roster and thinking "Work my butt off in Spring Training and I have a chance to make it!". He has an opportunity.