The 323s are leagues better than the slow, noisy and uncomfortable 319s. They have much better acceleration with far superior interiors which are actually warm in the winter, plus the 323s can actually be deployed in pairs to boost capacity. As for the argument the 323s are too small, they just aren't, because the difference between the two classes is a whopping eleven seats: 286 on a 319 and 275 on a 323. I really don't think they need tables and armrests either, to be honest. They're commuter trains, not regional or intercity trains where I would reasonably expect to find those features. I genuinely can't think of a single aspect where the 319 is even slightly better than the far superior units which are replacing them, and not before time.