I've recently noticed that every car with an H-pattern shifter no longer needs the clutch. They even rev-match on downshifts, and I can shift up without ever lifting the throttle. It's as if I have auto-clutch enabled - But I don't. The clutch is completely optional - even on old cars like the Honda NSX or Ruf Yellowbird (and these cars certainly didn't feature dog boxes or rev-matching). I've checked all my in-game settings and the only Difficulty setting I have enabled is "Invulnerability". I distinctly recall this working properly fairly recently. Did an update introduce a bug where every car now has a sequential box?