Yes it was a dead rubber the moment things levelled out. Doesn't really have the feel of a title race when scrutinised. Even worse was how City mauled them in the supposed decisive head-to-head, which, I think, put everything into perspective (twice, but especially 2nd go round).Also we tend to forget they had played 2 more games than City for most of the season, making their leads larger than they "really" were. Without those and with City following much closer, they would have very likely crumbled even sooner. I'm not saying it's outrageous to call Arsenal's league season a title challenge, but for me personally it was a very tepid one, if at all.
Arsenal were outstanding for half a season and that carried them for a long time, but the machine loomed far harder than it appeared to for the reasons you highlight.