Oftentimes I do a lot of testing in order to work out how to structure a task. This means running a bunch of geoprocessing tools with slightly different parameters, outputs, etc. These tool runs are saved in History, but it would be great if I could grab that history item GP tool with the inputs/outputs/parameters saved there, and add it directly to a task without having to recreate everything in the task builder.

Something like that little mock up, though I'm sure how the mechanics of doing so would work.