Not necessarily. They've already seriously retconned Pike having foreknowledge of his fate, and used that burden to expand his character immensely. They did a similar thing to Chapel by having Boimler accidentally spoil the fact that she and Spock don't end up together, and that has been further built upon to allow her to grow as a character. There are enough big gaps in canon to play around a lot.

I think of it like a historical drama. For, say, a show set in the thirties, you know the next decade is going to be all kinds of hell for every single character, but they don't know it, and the dramatic tension of that is something that can be used to write stories that you can't do otherwise.