Hope you have read these threads before purchasing AA CS5.5.
Nothing has been "done away with", just certain features didn't make it to this release due to time constraints in porting Audition to the Mac as well as the new version for PC.
Between Adobe's crappy customer service center (that know virtually NOTHING about Audition, since they are probably not audio types, this doesn't surprise me) and the cajones for them wanting to charge me $39 to resolve an issue after I just purchased an upgrade for both Mac and Windows is absolute insanity. Add to the fact that there is no controller support for my Tascam FW-1082 like they had with AA 3.0, and I am just plain outright disgusted. It only proves to me that this new version of Audition was not put together by radio/tv/film production people. It was put together by techies that know their way around an Apple or PC enough to create something that looks good, but is USELESS for anyone in the industry. I suggest, in my humble opinion, that you get some PROS on your phone/customer service line who known your product in, out, backwards, and forwards. I also suggest putting people in the labs to develop this software that are actually in the industry, and KNOW what's needed in a piece of software. Just sayin.....