My read: the stated rationale for killing Google Reader, especially in light of the huge cry of protest and impacts on blog traffic (Rob Malda posted web traffic results showing huge declines at WordPress and other blog sites at WashPo) suggests to me something else at work.
Just a hunch.
Usual theory about driving "updates" traffic away from decentralized RSS and into proprietary arms of Google+. Twitter removed RSS feed access to an account's updates for the same reason.
But I completely agree that there is probably an alternate force at work here.