Option to Zip All Outputs
For workflows that produce various different output files, I think it would be nice if the Gallery had the functionality to create a single zip file containing all outputs. The user would opt in or out of this functionality using a checkbox in the Gallery workflow settings (for apps, this checkbox could also appear as an additional setting above "Questions"). After the workflow has been run, the user would only see the zip file in the output preview instead of each individual output file.
This functionality would create a more user-friendly experience as it would eliminate the need for zip file creation workarounds, such as using the Run Command Tool or the "zipfile" Python library to create zip files (these options also do not generate a zip file in the Gallery output preview).