Thanks for the offer. I am looking for someone who can work with too. There are so many limitation (or difference) when interacting with OLAP cubes...
I will e-mail you to get some advice.
Yes, the Tableau functionality against OLAP sources is dramatically different and, notwithstanding the major analytic bennies that OLAP delivers to Tableau out of the box, is limited in terms of Tableau-based customization. As an Analysis Services OLAP developer, however, I'm lucky to get to build my own custom MDX expressions and/or sets in the cube to support specific Tableau requirements. Having said that, the Tableau documentation on using OLAP data sources is, tragically, almost non-existent. In the short-run, therefore, it's best to build the working relationship with your OLAP developers.
Of course, I'm happy to interact with you people on this topic. Let's keep the conversation going.