In the episodes I listed above: "The Enterprise Incident", "Face of the Enemy", and "Inter Arma Enim Silent Leges", they all involve Romulans. I think they'd be such a good fit for the series, I'd like if Georgiou returns to 2266 instead of 2258, so nothing from "Balance of Terror" would apply. You also have eight years for Tyler to set up his version of Section 31 that way, so it would already be established by the time Georgiou comes back. An eight-year difference would also provide cover to make Tyler into a better character, next time we'd see him.