Overall, I really like the new look. It's sleek, modern, and shows more songs at once than before. But some things I think could be improved are:
https://imgur.com/a/lazer-song-select-changes-XfOig35
* Image incorrectly says right instead of left
- It's a bit laggy when you first enter the song-select menu
- The update beatmap button is quite small and can be hard to press
- The spacing of the top-right UI elements (search, show converts, collection, etc) could be improved. For one, they don't sit flush with the right edge of the screen. Second, the left-side margin is a bit thin. Lastly, the "search..." text is a bit too far to the left* compared to the other menu items. See image below.
https://imgur.com/a/lazer-song-select-changes-XfOig35
* Image incorrectly says right instead of left