Profile stats have been revamped significantly. They now include counts, posts, mistakes, and the new "time spent counting", which is the number of unique seconds attributed to all of your posts (including invalid counts). I should probably do this at the thread level too now that I think of it...
Profiles also include a GitHub-style contribution graph showing how many counts per day you posted.
Next up, profiles have the number of unique seconds you've posted throughout the day, in UTC. Try to get all 86,400!
Additionally, there's now a sitewide tracker of both centiseconds and millisecond completion rate. Centisecond is already over 99.99% complete! Only 536/8,640,000 remain! Surely we will get to 100% pretty quickly now that we're tracking this. Millisecond completion is WAY harder. We can't really get a consistent millisecond even if we try, so even completing a single second is far more difficult than 100%-ing centiseconds!
Another profile-specific stat is spread of counts from 00000-99999, in non-double threads. Try to get all 100K!
Profiles also include thread-level stats for counts and speed, alongside your ranking.