It would be really nice if butler could upload already-packaged files without repackaging them as zip files.
In particular, I want to use .AppImage files for Linux, as I feel that this provides a better use experience. I could put these files in zip files, but that makes them less convenient for the end user. I could also upload them through the web interface, but that makes things a lot less convenient for me. (Building, packaging, and uploading my game is a single step for my build system. Having to manually go through the web interface add lots of additional steps that are easy to mess up.)