I'm not talking about that, and it isn't my point here. I don't approve nuking the feats, I approve of not just scaling the speed to weaponry without giving context.
As I stated some time ago in this thread, of course that there are cases and cases. I'm not denying that it wouldn't apply in any case, nor that there is no value in such feats. The examples you provided are all clear examples when this should matter.
The problem I see is more about the lower speed/human tiers. On the higher tiers, with feats such as you described, it works out. When you get to the lower range of speed, of people of Human to Superhuman speed, you get massively inflated reactions and combat speed by scaling people to weapon speed when they clearly shouldn't.
All the exampls provided would already result in massive speeds even if you only took into account the arm swing speed. (Which is the idea here, methinks. Not to nuke the feats, but to calc based on the arm movement rather than the weapon movement - and even then, with cases) Which I don't worry about that much, I'm more worried about assigning Superhuman reactions to normal people because they blocked someone swinging a pipe to their head or ducked below a sword swing, when under most circumstances, attempting to calc based around the weapon swing makes the speed way higher.