Calculated measures in multi-dimensional SSAS cubes

There appear to be a few posts requesting calculated measures in 'cubes' which seems to get interpreted as a request for tabular cubes in the feedback and completion of the task. But we need the ability to add custom calculated measures in Power BI when directly connected to a multi-dimensional SSAS cube. Whether it is enabled through MDX or DAX, this would open the door for us. Our company (and I'm sure many others) have deployed a few hundred MDX cubes over the years but we don't want to start customizing them all to include every little calculation that a user of the cube dreams up. The customizations would never stop. The fact that PBI doesn't allow custom measures on multi-dimensional cubes is a huge hindrance to our adoption of Power BI. Please vote!