Are custom visuals a possibility for you? If so, I would highly recommend taking a look at OKViz’s SmartFilter Pro if you haven’t already. It’s highly optimized for performance, has far better search capabilities that native slicers, built-in reset buttons, cross-filtering, boolean filtering and some other features that may help you meet this requirement really well. In addition, they’ve got a lot of cool formatting options that look slick in a report.