It constructs a deceptively elegant device to leave in place all that has gone before, while striking off in a bold new direction. It’s a fresh coat of paint on the ship that we’re all already familiar and comfortable with.
There is indeed a moment in the script—I won’t say what it is, even though it’s already been leaked and widely discussed, since I promised no spoilers—that indelibly marks this as a new continuity; it’s sure to be controversial among the fans, but it’s not a cheap stunt or way of dismissing the old stories. It’s the story’s way of cementing a new identity all its own.