Share your thoughts on DirectQuery for Power BI datasets and Azure Analysis Services (preview)

This feature could be incredibly powerful. I have a core dataset that requires slight enrichment by each customer... which currently would result in many datasets. I'm excited at the possibility of reusing the core dataset and then enriching it. 

One issue I noticed right away is that it doesn't seem like date heirachy from the Power BI dataset i'm connecting to is supported. Any chance that can get fixed?