like any other athletic movement, jumping is idiosyncratic and the method that will work best for an individual depends on that individual's relative strength, mechanics, mobility, etc. training technique is important but after a certain point there's no way to say one approach or plant is better than any other for a given athlete. i pretty much jump stop with my feet facing forward. relative to gen pop, i have an elite vertical (95% if not significantly higher). golden child jump stops. t-dub one-twos it with his feet at an angle.
makes me think of what charlie francis once said about ben johnson: he ran with one foot pointed slightly outward. that's "wrong," he'd have had more "perfect" technique if both feet pointed perfectly ahead. but he was the fastest person in the world, so (1) "correcting" the foot in no way guarantees improvement and (2) who gives a shit?