No one said to get rid of the old method, so why would it affect people who know it?
So it's better to add delay and break current keyboard convention, instead of just adding delay? Yes, let's encumber everyone. This kind of thinking has brought us brilliant ideas in the past, like the hardware delay on the Eject key (which prevents it from being remapped to something useful, like Delete) and on the Caps Lock key (which prevents it from working half the time).
And I don't know what you're on about with the Final Cut Pro X strawman, but you may have heard that Final Cut Pro was discontinued. That was a very popular product, and now it isn't. You're the one reading some kind of judgment into it.
Same old Internet-forum tactics... don't like something, call it a "rant." Or project your own biases on everyone else.