Oh boy.
This is a very old and incredibly flawed argument. "I do not understand, therefore, it is ineffable." Just because you don't understand how the universe works, or just because humanity does not understand every single bit and piece of it, does not mean that the universe is constantly making up new things for us to discover just for the sake of staying one step ahead of us. Every single bit of science to date that has been widely accepted by the academic communities gives no reason to believe anything but that the universe is mathematically consistent. Yes, some old paradigms get thrown out in light of new ones, but in many cases over the last few hundred years, both paradigms tend to be mathematically rigorous. Back to the main point, though. You're basically saying that because we're constantly discovering new things the universe must constantly be creating new things for us to discover, as I read your post. This is frankly arrogant bullshit, since it assumes that 1) we are at any given point in possession of the totality of available knowledge, so any addition to that knowledge requires creation of new physical/natural phenomena, and 2) that the universe specifically gives a damn about humanity. To put our incredible insignificance into perspective: the entire Milky Way Galaxy could one day just up and explode, destroying everything in a five-hundred-lightyear radius. The universe wouldn't even blink (figuratively), because the observable universe alone is about fourteen billion lightyears across (I've read somewhere, though I cannot recall where, that the actual universe is about ten to twelve times farther across).
Also, under the interpretation that new things are being created for us to discover, is a book constantly in the act of creation, as we read it, because otherwise we would have read the whole book? Is a painting or a song constantly inventing new parts of itself so when we go back and experience it again later we can pick up on something new? Of course not.
The universe is mathematically consistent, by almost every single observation we have made and almost every accepted scientific explanation of it. We do not know everything at any given time, and so we are discovering things that were already there but which we did not know before. There's no magic or sentience of the universe in that. Does this necessarily preclude a sentient universe? No. But in no possible way could it be used to argue in favor of one. There is simply no possible logical connection between "the universe is complex and we are constantly increasing our understanding of it" and "the universe is a sentient entity constantly creating new things for us to discover".
Yes, there is large-scale structure to the universe. Yes, there are things we cannot explain. Yes, we are constantly discovering new and strange things about the universe. That doesn't mean necessitate any higher intelligence or higher form of existence. The universe is weird in a lot of ways, but it's weirdness is consistent.
The sentience of the universe is certainly an interesting idea and certainly good fodder for philosophical discussion, but frankly, such an assertion has no right in trying to pass as scientific.