It was originally Indo-European. It's a sun wheel, nothing more. Indo-Europeans didn't have angels.
He probably had to. With No Such on his coms, there are some things that can only be said face-to-face.
That said, I'm certain that several cells had emergency meetings in secure (or so they thought) locations. Q likely kept things vague for opsec and psyop reasons: to inspire fear, mistrust, and suspicion among the conspirators and promote chatter.
Analystfag concurs.
In order to move the window in American public perception to a place that will accept the otherwise unacceptable allegations, they need to be prepped. Hence the Q-group outsourcing and crowdsourcing the effort in order to harness the raw autistic power of the chans.
Most normies accept a certain amount of social eccentricity in their celebrities. Madona and Kabala, Hollywood and Scientology, etc. It's part of their exotic nature.
When politicians start using the term, however, and it can be used in a serious context (thanks to the arrogance and poor opsec of the conspirators) then it enters the popular lexicon in a way that allows for the next incremental drop. It's rather elegant, from a psyop perspective.