@shmibs i'm entirely aware of cosmogeny and cosmology as understood by modern physics lol. hence my usage of the terms substratum and universal medium. (which is as broad as your use of "universe" and also frontloads my personal cosmology as you do yours) "universe" itself is a word attaching itself with facility to numerous ontological and epistemological objects (over thousands of years). by referring to its usage i was clearly speaking of how the word universe is used in contemporary english, hence it being a semanticist's folly. as for your prescription that one definition be used, you deem yourself tautologically correct when you supply your own principles to start with. for example saying the universe is mindless, that consciousness is an emergent property of it and not the opposite. ultimately you'd prioritize object over subject, because to you subject is an object, hence appealing to science which describes the things unified in its consistent observation by different consciousness and in doing so purports to also describe consciousness. my intention in providing these examples of "universe" was that universe is always a bounded term, as you noted, whether boundedness is attributed accurately or inaccurately... the universe is everything that manifestly is and nothing that isn't. and since you presume to know what is, and science is what is and everything real is science, of course you arrive at your desired end where the universe is equivalent to everything science determines or can determine is real (by observation/effect)-- it is ultimately circular. you don't understand why anyone would disagree with you because you are agreeing with yourself.
could the monad be called the universe? as i said earlier, sure, but it shouldn't. i think nuance is important, and so i would personally refrain from using words at such a linguistic register where they are subject to the whims of popular descriptive variation and prescriptive complexity as "universe".
as for the appeal to mathematical objects such as ratio pi, i'm not sure if you're trying to describe a property of the universe or a property of god or both i guess?? as boundedly infinite??? is this the sort of philosophy under the guise of metamathematics lending itself to mathematical platonism? it reminds me of how cantor thought set theory was divinely revealed while others reviled it as blasphemy... anyway it is just as irrelevant as then and just as sophistic as describing the human brain as a graphical rendering engine.
you agree with yourself and are self-satisfied, thinking it free of emotion (which is impossible to pry from human thought in actuality)... but it is not...