The new site is horrible. I used to like coming to it to view my Friends' images. I don't like to have pages come up in the ugly, busy Flow format, where everybody's photos are in a disrespectful mish-mash of cropped sizes. I don't like having to search through my friends' List to find photos. I liked seeing them as they appeared on my Friends page.
I don't like that the 500px staff has officiously not allowed member contributions to most of the Q&As in their Support pages regarding these changes.
See you on Flickr, Facebook and Google Plus.