Really cool atmosphere, really great mix.
I think the randomizer subtracted more than it adds for the timing on the first bit. Violating a expectation of time is a stylistic choice, but I think for ambience, the effect is that it pulls the listener out of the space of being in the context of using it as ambience. It grabs the attention in a way that pulls the listener out of a sort of flow, which in some styles of music is actually exactly the purpose.
Overall though this is really cool.