I wasn't able to find any similar suggestion upon searching this forum, at least not for the past year.
First of all, I love the stats WP.com blogs provide. It's one of the things that attracted me to wp.com years ago. They provide the most important info in the simplest way possible. However, I believe the last change it underwent was December 2012 when it started showing unique views. I understand it's not practical to implement an array of in depth features for a free service like this, but I do have a few simple ideas which basically build on what's already there.
The addition I'd like to see is more 'visitor' stats. For instance, I'd like the 'Best ever' stat to include visitors as well as views.
Same with individual posts. Being able to see how many visitors specific posts get would be quite helpful for a number of reasons. One of which would be in the case of paginated posts, as I'd be able to better gauge how many readers clicked through all the pages, giving me a good idea of how many people actually read certain posts all the way through (if a post has five pages, but only gets an average of 3.2 views per visitor, I can get some idea as a writer where I'm losing people in that specific article).
Just some food for thought.
The blog I need help with is ewwty.com.