Are you currently getting real value from using the tool, or is it just something your people are doing because it's required?
- If you ARE getting real value, then I'd recommend that you upgrade.
- If you are not getting genuine value from PowerDesigner for the effort you invest, then drop it.
I used to use PowerDesigner (way back at version 9), and recall that it was fairly easy to use and was a decent way to capture knowledge. I'm a developer so I cannot speak to any of the DBA-specific functions, like generating a complete database from the model.
We dropped the use of PowerDesigner years ago, because our shop is small and it was not providing us with any real value.