It would be really helpful to be able to run more than one GP Tool at a time. I was adding rasters to a mosaic but in the same project, needed to apply symbology from one layer to another. The latter is a really low overhead and quick task, but it still had to wait almost 30 minutes for the mosaic to finish. I know there could be conflicts because we also will set up things to run in a certain order sometimes. Not sure the best way to implement this. Maybe default is run linearly, with a pop-up arrow to allow the user to select Run Now or Run Simultaneously.
