Just interesting, if it is possible to debug the admin side in Manento2. If it is, wold be glad to saw some hints.
Debug process now
For now I'm using PhpStorm with XDebug. If I want to debug some module, I'm just setting breakpoints and run in debug mode "Php Web Application" preset with link to this module. I suppose this approach can't be used to debug the admin side because of some "key" dynamically generating all the time.