You are kinda right. But it not so much a speed thing as and easier way to see what folders the users have access to.
Currently if you have a user and want to find out th efolders he has access to, you would have to click on each folder and look at who has access to see if they are listed. I like this for the times when you want to share a quick folder and give access to it. The way it is would be easier for that.
But for long term users or groups, it would be nice to assign folders to the groups so that you can look at a specific group and see all the folder they have access to.
Hope this helps. This is really not a big deal. just a though to think about when setting up the groups function.
Thanks for this program and for giving the users the options to suggest functionality. Keep up the great work