I'd say Vir isn't buying into the Back-to-the-Stars-War being a good thing for one moment while Zack does believe Night Watch is harmless and patriotic until rather late in the game, but which of them that makes more or less complicit I couldn't say.

Speaking of Zack, though, reminds me of that scene between Vir and Garibaldi in "No Surrender, No Retreat", when they briefly talk about Garibaldi's fallout with Sheridan and decision to leave B5, and Vir says "I don't always like the way Londo is doing things - well, me and most of the universe" but that he decided to stay with Londo nonetheless, and suggests Garibaldi should do the same with Sheridan. Leaving aside Garibaldi's mind-manipulated status as irrevelant right now, this equates, on Vir's part, s4 Sheridan with s2 Londo, which is... interesting.