In russian translation team We have found, that it's very useful to use sed utility for batch processing lang pack files. Such processes can be: replacing "Ё" letter to "Е", changing "" quotes to pretty « », replacing two spaces with one, deleting trailing spaces and etc. But amos allows uploading of just single processed file at once.
It would be very nice if amos can take many files at once when importing. As most simple variant i see ability to upload ZIP file, containing all files.