Right now, if you're making significant changes to an existing cube, the only way to verify that you haven't broken something is to actually do a build. I'd like a Verify or Validate button, next to...
DRay I think what might be helpful, is if there's some hint text (or a hover-over "i" info icon) which explains what Sample Data does. I never really paid attention to it since I thought it did something different. 🙂