If that is the case your point would however still be valid in cases the player really starts hitting the buton too late. But I think that happens quite rarely; as DRG I can easily switch between rear and flank while maintaining my attacks.
All in all it is hard to tell if effect one actually happens in practice.

Effect two: Disengaging) The player 'loses' the future additional attack provided by skillspeed whenever he disengages from the mob before he makes said attack. I think that is not true and important to understand. 'Disengaging' happens basically on in two different forms: Purposely (for example when you switch to an add) ore forced (Boss disappears or knocks you back for example). I made a post on the latter case earlier in this thread and reasoning that skillspeed will statisticly don't lose its effectiveness then.

-1000 Chars-