hi chicagoTaiJi,
along with others, i'm a bit confused as to what your point or objection is.
with due respect, i'm honestly not sure if you are posting material to be honestly discussed, or whether you are trolling. it has seemed to some that you are trolling.
i think a lot of good points have been made here by people commenting. i think su dong chen's teaching is partly about getting people to think below the surface. about the potentials of direction and intention inherent in movement, and tactics. rather than accepting a singular, or "rote" use of a form or movement.
the "high peng", or whatever you want to call it (that you seem to object to), is however also quite common in bagua, mantis, etc. if it's blocked, as in the demo, you can take advantage of that, either directly by changing upon that block, or indirectly by changing your attack, which is what he shows in the clip.
it's not an uncommon move, imo. one can find it in various arts. given this i was surprised by your objection. and, honestly, i can't understand it.
on his use of peng. no it doesn't demand a step. as someone said: sometimes you can't see everything from exterior movement.
i can say this: having met him, studied with him for a short time, and having been hit (and thrown) by him a bit (not full power--not necessary): if you doubt what he's doing, i'd suggest you taste.
his understanding of the classics (of all three arts) is, imo, quite sophisticated.
he does have his own interpretations of some things, and is not an echo of lots of other people. so, yes, what he does doesn't look like what some other people do.
but, for someone to dismiss him out of hand, is beyond my comprehension.
you've limited yourself to comments on his peng clip. do you have comments on lu, ji, and an?
this is not meant as hostile. i think a lot of us are wondering how to respond to you, and are trying to in the best way.
best...