This update has been long in the making, it's too late to complain about it now. I like it, particularly the ability to have a trailer showcasing my channel to anybody not subscribed. According to my stats, it's the one biggest puller in of subs(and subsequent views) on my channel.
The other thing to consider is that no longer are you limited by any lack of html or other coding knowledge(I'm not sure how the old layouts worked) to get yourself something professional looking. Now with a smart banner you'll look just like the professionals, so it's all the more important to get that branding right.
Basically, most of the old excuses are out the window and everyone starts with a clean slate, aesthetically speaking. You can organise your channel as you see fit - a playlist here, recent uploads there... long story short you lose aesthetics but you gain so much more so stop being so negative and embrace it - the longer you tell yourself the One Channel sucks, the longer your One Channel will reflect this as you've not put the effort in. And it's here to stay!