Overall, I like that they're trying to clean up the layout. YouTube needs that, especially on desktop. However, I think the new look isn't quite right still...mobile may be fine, but the fonts/color combos (tones of grey and blacks) are off imo...no more blue thumbs up for contrast means all the text gets muddled together.
Also, I've noticed the creator studio is not very user friendly. I'm pretty quick to learn things and explore design updates to test out the features, but it doesn't feel polished up yet. For example, it's hard to go into your creator studio and edit your playlists to change the order of the videos, unlike the old version which (still took too long imo) but it was easier than it is now. There are several "paths" you take in the Creator Studio that are not intuitive and you have to click around to figure out how to edit things that should be much more simple. Anyone else notice this?