They're eliminating the story lines on the manga seasons without the "PROPER MANGA" characters that are supposed to be there. Perhaps since they've had a chat with the manga author that don't include the others in the manga and should remain manga exclusive and the anime should remain a spinoff.
OVA's are the best way to go or another season that will set things strait since nearly all the major manga chapters here in season1 and 2 are done, but without the "MANGA Characters" that was supposed to be there in the first place.
Please 3rd season or a new OVA!!!