With Gmail, I just forward my mail to my Outlook.com account, and I switched my email address on as many sites as I could to use my Outlook.com email address. Works just fine.
Office Online with OneDrive is a fantastic product. Sure it costs money, but if you're not paying for a product, you're not "locked in". Download your docs in Office format and save them to OneDrive, done.
I actually switched to Bing Maps a long time prior to this because Google Maps has such poor performance on every computer I use it on. Google Maps has the far superior place search, but Bing Maps works better as an actual map in my experience.
The only Google service I use regularly is Google Translate, because there really is no comparison.