Due to the amount of extra computation done on each project upload there is not much for batch processing.
You can upload a zip file and all files inside get part of the project, so if you have folders for each model and zip them it might be faster. Also inside a project you can drag and drop multiple files at once to speed up adding a bunch of files.
There is no batch edit tags/licence and I do not think it will come.
Image for a folder is a nice idea. Have to think about this one, but currently I need to finish new printer solutions. But I put it on my ideas list for new features.