I think the X button is not only an important part of the Youtube experience, but is a necessary part of it's functionality. The I feel the reason the subscription feed has become difficult to scan is because we are forced to re-scan through videos we've already seen. Before the homepage change I would watch the videos in my feed, than return to the homepage to delete them. Later I would check my homepage again to see if there were any new videos, and if their were none, the feed would be blank. Now when I return to my homepage, I get a massive swath of videos, some of which have been sitting there for weeks, and I am forced to scan through the entire list and check every title from every subscription only to discover that there are no new videos.

So I beg you, please bring back the X button.