The yearly recap could be enhanced with a social aspect of introducing some degree of comparable experience. Knowing the hours watched in the year is nice but it could be helpful to know how that stacks up to other viewers. Same for chatting etc.
Additionally descriptions for how you gained an achievement would add context to the experience. (This information can be found by following the link and scrolling through the next page down to the "bonus achievement" section! It is really cool!)
Great work this year everyone! Hoping for the next year to be even better :)