Would be nice if Acymailing V6 has integration with JCE Media Manager instead of using default Joomla Media Manager. That is to take advantage of JCE's Media Manager features where you can create, delete, move, cut, paste folders and/or files or event resize and crop images.
FROM:
https://take.ms/ty6N1
All you can do is to select a file and upload a file, what if you want to create a new folder? Or resize the image to a certain size?
TO:
https://take.ms/esOFw
It has the basic functions of a media manager.