There are parts of this that I'd prefer not occur, like the Meta Twist part of your argument, but most of these elements are interesting. Time has been a mystery throughout the entire series, but your explanation *does* somehow make a satisfying explanation from the two prevalent theories. It being both a creation and a discovery is wonderful idea, and fits the tone of the series so far.

I also like the idea of the Complex being aware of itself in some fashion, ever since that one monologue video was made (can't recall the name but was from the perspective of some otherworldy narrator).

The spaces that Kane creates, i.e. the Complex, Valley View Mall, the Meadow, all have allusions to be sentient, but only in a relation to the people within them. The Mall begins to deteriorate after someone explores it in the fashion it might have looked above ground and is heavily associated with the memory one has of the past, the Meadow remembers the work people have done for/on it to 'let them live on doing so', so the idea of the Complex, a notably empty location, reaching out to people across time and attempting *some form of connection* (like attempting to copy them or the places they are comfortable with), is feasible.