I think it looks better (on Mac and iOS) than any other Liquid Glass app. And I can’t blame Brent for adopting it. One of the standout features of the app is just being native, not trying to re-invent the wheel with custom GUI, and taking advantage of built-in platform features.
My favorite NNW feature is iCloud syncing: Not needing a separate RSS back-end (but of course you can use one if you want to sync with other clients).