The thing I miss is the photo album comment notification. Because of the wonderfully large selection of random photos, I've been seeing lots of pictures I never saw before and I'm commenting all over the place. But because there is no notification, if I want to see if somebody replied to my comment, I have to search for that photo.
I hate it. I really hate it. I HATE HATE HATE IT!! Man, it sucks. That's it! I'm never coming back! Screw this! I don't need to take this CRAP!!! Damn you all to hell!!!!!1
(Note: I'm kidding. I just thought I'd say that because these days it's hard to tell.)