I used it so often. The ability to see at-a-glance a show in progress and drill down to see how many seasons/episodes in total there are, and what I have watched and haven’t, and what’s in my collection and isn’t. And without a bunch of unnecessary graphics or clicking through multiple things. PLEASE BRING IT BACK!!!
I just realized too, that the new “Progress” page has a percentage displayed on each show that doesn’t refer to my progress of that show, but rather, the shows star rating, according to trakt. 
Me looking at a show that says 70%. Hey, I know I finished that show, WTH? Oh wait, I see, the percentage displayed has nothing to do with my actual progress of that show.
Trakt was a good idea, however they dont seem to know how to implement their idea! Im done, i can keep better “trakt” in my head