Those revivals are mainly due to the nature of the American comic book industry where there isn't a set writing team throughout a character's entire history. You have a rotating crew of editors and writers, each wanting to make their own mark, like bringing back dead characters they loved, during their run. That's why you end up with these brain dead revivals like they did with Kraven the Hunter. I'm not knowledgable on how Ian Flynn treats "retired" characters (I didn't read the Archie comics) or if he clashes with IDW editorial too much. It would most likely fall on him since he's the head writer.