When I set up a filter driving several reports on a dashboard I wish I could specify on a report by report basis whether that filter should drive actual filtering or whether it drives highlighting.
For example, imagine a numeric display report that shows a single aggregated metric and a bar chart that shows the same metric broken out for each employee in the company. If I use a filter to select four employees I'm interested in, I want the numeric display to recalculate for that employee but I don't want the bar chart to filter to just four bars. Instead I want to contextualize those four employees relative to the others. To achieve that, I would love to configure the filter to drive "highlighting" on the bar chart instead of standard filtering. When I filter to four employees, those four bars on the chart would highlight but the others would remain visible. Alternatively, the non-selected employees could become semi-transparent. This way I can see the data I'm interested in in-context.