Hmm... maybe I have to add more (a lot more...) folders to the folders list... but I don't have _any_ data that I have to work with in ~/ or anywhere on the system drive... it all sits on the 10 permanently mounted external drives - and there is a lot of data...
So really the file action is where the file buffer would be most practical to me: I have the project folder open, I select and add 3 files that I need to send to the team, then remember I also needed to send file 4 that is in one of the subfolders, so I would like to add that to the file buffer... and just remembered also file 5 that was on the top level... oh and also these 3 audio files need to go with it - that's how I collect what I need to exchange with the team... yes, yes, yes, completely shared or synced folders or file systems, I get it, that would be nice, but we have people in the team who can and regularly will ruin those shared folders, which then breaks stuff for everyone... so we have to stick with manual syncing for the foreseeable future.
The way I'm currently doing it is to just select the files I need to send, then trigger an Alfred workflow that copies those files to a "send" directory, go through the project folder to select the next couple of files and so on and at the end I go to the send directory and create a zip and upload - if I could just collect all those files in the buffer I could trigger the compress and upload when I'm done collecting files...