Having just upgraded to 365 Premium, I notice a few things...

1) Publishing - the upload is PAINFULLY slow, by a factor of 5 or more (1/5th of the upload speed of WD11P)
2) Animations a bit sporadic - tried adding fade from left or right - got nothing at all on website.
3) Parallax scrolling - NICE! Thank you! Very jerky in the preview browser, much smoother in Chrome, Edge, etc...