Non-Spoiler: Of course they stretched the content enough to make MHA have another season. As enjoyable as it was to watch I got very frustrated with the focus on cliffhangers only for the following episode to not even touch upon it leaving you hanging till the following or sometimes even two episodes down the line. It might have been how it was written though. I find similar frustration in the very short chapters of Kaiju No 8 manga where it's basically spoon feeding me little by little in long intervals.