User blog comment:B214/Question and Answers 6/@comment-185.112.105.215-20161228104658/@comment-9595671-20161228165241

Yeah, the Student Council and ORC are the ones that actually control Kuoh, the Student Council by day, and the ORC at night. So it's Xenovia and Asia who've taken that role.

Had Rias given the job of ORC President to Issei, or atleast Akeno the job of Vice-President to him, then Issei would have been this. Though I'll admit he's not the best leader.

That's probably why his suggestion to form ExE implies while he will become it's leader one day, it won't be immediately after the group forms cause he's not ready for that responsibility just yet.