We are not running these as a multi-site setup so there is no Super Admin, but we've found something interesting.
In looking through the plugin's code, we commented out Line 194 through 198 as well as line 678 through 682. These code blocks start with a comment "exclude super admin". By commenting this out, Adminimize starts to work for the Admin roll in all areas of the admin panels besides the menus and submenus.
It appears that by excluding the Super Admin, it is also excluding the standard Admin roll as well.
I hope this helps others. We're been scratching our head for about 48 hours.