There seams to be the misconception that Fritzing should be among the ranks of Eagle, Altuim, Diptrace, and other commercial EDAs. Fritzing is and open source educational tool to help makers (both young and old) to get acquainted with the wonderful world of today's electronics... Fritzing does what it was design for; teaching the relationship between your schematic, breadboard prototype, and then making your prototype on a PCB... either DIY or by a prototype PCB fabrication service. Fritzing has filled a gap in the Arduino revolution... with today's high-tech PCB manufacturing equipment you can buy commercial quality PCBs at just a fraction of what it would have cost just a few years ago and affordable to everyone, and Fritzing helps make that possible... Comparing Fritzing to Eagle is like comparing Arduino or Energia IDEs to IAR or Kile... you are not going to write commercial firmware for a ARM Cortex processors with Energia... the tools just are not there for writing commercial firmware...
Use the right tool for the right job... for what you want to do you should be using one of the commercial EDAs... and for creating centroid files for an assembly house, Eagle is a good choice...