Our customer requires flexible report layouts in SharePoint. For example, if we create a PivotTable, a PivotChart and a filter in Excel, then these three elements should be made available as separate webparts so they can be placed anywhere on the SharePoint page, e.g. the filter should be placed into an area which only opens on demand. The different webparts that make up the one report should still interact of course.
Another demand is to export certain parameters, e.g. the name of a dimension, and again make that option available in the form of a webpart, so the end user is able to select from a preset list of dimensions.
I am unsure if any of this is at all possible, since I have worked with rather "plain" Report Services reports and some Excel Services (w/o PowerView) reports in the past. I am thankful for any hints concerning such customizations, whatever the technology may be (must stay in the MS BI world of course). Even implementing custom webparts that somehow communicate with SSAS (using Reports Services web service maybe?) would be an option if everything else fails.