I think you're being a little unfair here. City sales weren't that bad even prior to the facelift. Corolla has taken a bigger chunk out of Civic and the rest were corolla buyers that were simply waiting. Next months sales will tell the story though they unlikely to compete against Corolla but sales could increase marginally.
I agree with some other comment here. It ain't really a great upgrade look-wise from exterior. Kind of like the Cultus chrome rear lights they did, which didn't look that good either. It looks better in pic than in real (to me).
Since Liana is a complete No, its u unlikely City will suffer a lot than it ccurently is. Toyota combined sales would still be double that of Honda. City will still maintain a 1000+ cars/month.