No. In fact, the solution detailed in that article accomplishes the exact inverse of one of the letter's demands.

While the letter wants third-party content not to be surfaced in a wrapping viewport that downplays the fact that it's actually Google's AMP Newsreader, the recent AMP announcement details a planned change where emerging tech [1] will be used to make the URL appear as if the content was directly loaded from the distant origin, because the content being served has been digitally signed by that origin and its serving has been delegated to Google akin to how a run-of-the-mill CDN is delegated the authority to serve content for a domain that's 'spiritually' owned by someone else.

However, the recent AMP announcement does address a very frequent complaint about AMP. Just one that's at odds with the one the letter is requesting.