i consider it liquid but i can see where drew is coming from. the thing about builds(and remotes) is that they aren't exclusive concepts to liquid, so when you make a clip thats pretty much entirely comprised of this concept it may or may not be perceived as liquid. theres splits/rails/contours in this clip too but u'd have to actually make an effort to look for them since kai doesn't do any of them in a traditional way(for instance having a flattened hand).
i've been diggin the head movement since ur foray back into abstract liquid circa last year, but you could definitely do more with it. though i haven't really witnessed someone who does the other style of head movement(or lack of) that ur talkin about, i remember seeing on mkg's interview, or maybe it was something u mentioned him saying, about when he does digits he will stare right at a person to bug them out, cause they dont know whether to look at the hands on his face lol.
and speaking of last year, man u've got a completely different style now. your liquid has dissociative identity disorder(multiple personalities)