Well, there really was only two choices in that instance. One, crit the enemies and win in 4 turns, or be conservative and win in 5. It's similar to dondon's chapter 8x where he could kill henning early with a very low chance, or just be conservative and take more turns. I don't think that should deserve any criticism.
I'm just against strategies like, throw calill in the middle of the battlefield killing everything by abusing the crit glitch + vantage, then seize once everyone's dead. Generally, there's always a way to be stealthy and improve the odds, and I just enjoy when players outsmart the AI rather than brute force through them.