Soule has mentioned things being slowly unearthed over the course of the comic to let us know what happened so I think that whatever led to Matt being an aggressive DA in an elevator shaft was a major, major thing. Like, he had a successful practice and a great support system and he was comfortable with himself. . .now he's isolated and again prosecuting on the cheap in an elevator shaft. Matt's worked long and hard since Born Again for financial stability. If nothing else, he wouldn't give that up easily.

I dunno. In interviews, Soule has given Waid praise multiple times as well as other writers. I think he knows full well the task he's taking on since Daredevil has been written by so many Important Comics Writers. So I trust him and I think he is fully aware that post Secret Wars Matt is going to inspire a LOT of questions.