I would HIGHLY recommend you hold passing judgment until you've at least reviewed Vault Collaboration AEC 2012. We have made significant changes to the way Vault & C3D interact as well as the way your data can be shared with outside parties. VC AEC will NOT be free with Subscription, it is a separate purchase.
While you may still find that VC AEC doesn't do anything to improve your particular situation, I just encourage all of you to make sure you understand the latest product improvements before writing off a pretty powerful tool for Civil firms. Visit with your reseller, they should understand your business and situation to be of real help in making these evaluations. If your reseller doesn't have the answers to satisfy you, please ask them to contact me via the Frontline team at Autodesk.