These leaks that I've been seeing across Twitter and Instagram don't seem to look very good. The only icons that look somewhat decent are the weather, internet and clock.
The settings and phone app icons are by far the worst, I don't see why they needed to change them to these arguably much worse versions.
One UI 7 Icon Rumours
The live activities seems like a good feature, clearly inspired by thr iPhone's dynamic island but is still fairly different to not seem like a worse version of it.
The notifications have changed for some reason. It might be just for the lock screen, which would explain why no content is shown, but if it isn't, it would be a very questionable decision to make.
One UI 7 Notifications Rumours
A community made depiction of One UI 7 and it's rumoured changes
The only main issue I have is with the new icons, which most look terrible and shouldn't be included.
Other than that, the leaks seem like a pretty solid update.