Gerben -
The solution I reached is not ideal, but it works (sort of). I restricted the measure by each node in the hierarchy relevant to that measure. So if you have multiple levels (like most hiearchies) you can't use the top level and have the lower level nodes flow in. You have to use each lower level node as a restriction.
It helps a little with creating restricted measures based on hierarchies - as adding accounts to existing nodes will flow into the restriction, but doesn't have the full functionality like BEx. Anytime nodes shift around, you have to edit the measure again.