Thoughts (especially from the user base)?
Why yes! I've got some!

I fully agree that functionality as advertised needs to work. This means, among other things, that importers need to keep up with changes in source applications.
I also agree that it is a strategy issue.
Should the Visio importer be just essentially an advertising gimmick?
Or a way to sell consultants?
Or should it be a tool for the end user?
If it's a gimmick, all you need is something that you can advertise. It doesn't actually have to work.
If it's a consultancy hook, it has to work but should require specialized expertise to operate.
If it's an end-user tool, it has to work very smoothly, convert the majority of UMLish drawings with zero hand-cranking, and make sense to a business analyst who is not an EA enthusiast and in fact prefers Visio.
My current client gave up on the Visio importer a couple years back. It was distributed along with the client for general use, but there was no concerted effort to import Visio drawings on masse, more there-if-you-need-it sort of thing.
Departments and projects are not required to use EA or indeed UML, so when people tried it and couldn't get it to work they simply went back to Visio. Some of them did realize EA was the better tool even for their specific needs but they were not prepared to spend the money redrawing everything manually, which is what the level of functionality provided by the importer amounted to.
The lesson there is that when a tool switch is contemplated, people don't accept a very high cost for converting existing materials. The cost of retraining and updating internal processes is high enough.
And by the way, I wasn't being facetious with my consultancy option above. That's a valid option; if you can't (or won't) make the tool end-user-friendly, consultants can step in. But we would then also need support from the manufacturer, with solid in-depth documentation, maybe some transitioning training material, that kind of thing.
(I was being facetious with the advertising gimmick option.)
Anyway. There are some thoughts.
/Uffe