Google has actively sabotaged WP (and Windows in general) at every opportunity, including blocking MS from access to YouTube. I doubt they're suddenly going to change their tune (unless WP takes up enough market share to risk loss to competing Microsoft services).
Google had a long-time ban on Windows PCs at their HQ, mandating either Linux machines or Macs, until there was an employee groundswell requiring them to appear on campus. It's an ideological thing over there.
In general, I recommend that Google users migrate to Microsoft services if they're considering a Windows infrastructure. Hotmail/Outlook.com is better than Gmail, Hotmail calendar and contacts work better than their Google counterparts, and you can trust Microsoft not to sell your email contents to advertisers as keywords.