The general flu vaccine “misses” more than we would like because they are trying to make a very educated guess at what will be going around the next Fall (they have to start a year ahead of time to get something to the public soon enough).
In this case, they know specifically what the target is......and notice that it still takes about a year.
You might argue about the wisdom of our flu vaccine policies even though they are overall successful though not every year. But this vaccine should be excellent, targeted, and nobody should skip getting it when it comes out.