Make the summary statistics geoprocessing tool easier to use. If I've got one hundred fields that I want summarized I currently have to go in and add each one individually and specify the summary statistic to use. This is too onerous so I tend to export my tables to excel for this step. Other geoprocessing tools have the ability to add/remove all fields. I'd also like to have the ability to highlight a block of fields and set their summary statistic automatically for all of the highlighted fields.