I used Mendeley 7 years ago while working at HCIL. One of the most annoying things is to capitalize titles, correct DOIs, and rename filenames. Thanks to Python and many, many package contributors, I could finally automatic this process to some extent using https://github.com/ruofeidu/DuWebKit/blob/master/scripts/utils/autobib.py and https://github.com/ruofeidu/DuBibtex 🙂