Kurgan, what you are saying is right most of the time, but let me show you it this way:
Kick is useless because... I land a succesful kick: my enemy falls down exactly the same way as a stormtrooper does from lvl 1 push. Now look at the second part of the problem:
Groundstab Deathblow: there is NO delay before you can roll or jump out of lying on the ground. Groundstabs hits mentally ill or laggers.
Sabershield: as I have been playing, i so far found that it is not useless when enemy can't roll or jump away. But we are talking duels here, meaning not a single area is a corridor unless a dueler wishes to die.
I am calling these moves useless because i have never seen ANYONE use them effectivly, not because i cant use them