Yes I definitely believe that if a character has been written recently in a certain way, then the next writer to use them ought to respect that. If they want to make a change it's incumbent on them to 1) acknowledge this even IS a change 2) try to justify/explain why the change happens. I do indeed feel there is such a thing as "Out of Character" writing but again, over the course of time I accept a character can change. And yeah "Plot-Induced Stupidity" happens but that's largely because characters are WAY too powerful lol. Especially mutants, there are many of them with extremely wacked-out abilities and so for there to be ANY tension or drama, they have to not always use their powers absolutely intelligently.
I definitely think a GOOD story allows for multiple interpretations. In fact I would go as far as to say the experience of readers thinking and feeling their way through a story is CO-CREATING the work. So the original author/artist are not sole creators to me. Coming up with interpretations or getting inspired is an innate part of the artform