There is no quick fix for this team. There is pretty much nothing at the AAA level that will help. Most of the prospects are at the AA level. Maybe you could bring one or two up, but the best bet would be to move that group up to the AAA level together next year. The earliest they help is 2017 and even then they would be young guys still growing into MLB'ers. Likely 2018 or 2019 before they are making a real impact at the major league level.
Best bet would be to trade for a legit AAA prospect or two AND trade for as many A and AA level guys as you can, to restock the system a bit. Trade Lohse for whatever you can get. Same with Ramirez. Move Gomez for sure and think long and hard about moving Segura and Lucroy. Those are your 3 biggest assets and Gomez will be priced out of the Brewers market soon and Segura is dispensable because they have shortstops in the farm system. You hate to part with Lucroy because he's essentially the face of the franchise, but due diligence says you need to listen to offers.
Krod would like to stay, but I'd move both him and Broxton in a heartbeat. In fact there isn't a single guy on this team other than the young starting pitchers that I wouldn't deal and even then, I'd listen to offers on Fiers.