The tool looks very nice, it might take time to fine tune all of that but capabilities are strong.
BUT I was actually unable to keep this plugin installed : I lost Admin role ! :-/
I saw a workaround but it seems that it will not work every time... I do not understand php and this workaround is not for me.
I hope there will be a fix soon, then please let me know, I would be glad to test.
Another point that should be changed : when you create a now profile, you do not have access to admin menu options, I do not understand why - it would be useful to define minimum admin access for day to day work.