Selectable (and maybe even user-defineable) Down-Sampling Filters
A user can easily be confused with a live trace of a fast channel that's not displayed with a proper anti-aliasing / down-sampling filter.
Consider the addition of selectable down sampling filters, a default for given data rates (with warning to the user that data is being down-sampled / anti-aliased), and for the really ambitious user, the ability to define or input your own filter.