I really like that. Burnham as the Angel is just too... neat. Tidy, unsatisfying. But Georgiou atoning and possibly anti-bootstrapping herself out of existence trying to save the Federation, and Burhman, from an evolved Section 31 AI that's getting its start right now using time travel in the Kyle Reese-approved fashion... I can dig that.So while time-traveling Michael is still a primary contender for being the Red Angel, I think another strong possibility is Georgiou.
Fits what we've seen so far: the Federation computer awakening into sentience over time in "Calypso", the 'throwaway' line about Section 31's threat assessment AI, the vision of machine intelligences wiping out what seem to be the Federation homeworlds, the name of this weeks ep name checking Daedalus - a go-to reference for connoting technological overreach when you're tired of using Prometheus.