I downloaded the beta and the more I use it the less I like it. The icons are blurry, washed out and look terrible overall. I have a difficult time using the buttons on the lock screen to activate the flashlight and camera. Most of the time, I push them and the lock screen customization screen comes up instead of the flashlight turning on. I don't know if they changed the geometry of the buttons or what, but I can't reliably use them anymore. There are other instances of low contrast text, weird blurry artifacts and janky animations.
I hope these are all things that get worked out during the beta period. Overall, the whole thing looks unimpressive so far. I keep telling myself that OSX had the same kind of jank during the first beta and it will all work out. I want to roll back to iOS 18, but I can't do that without using iTunes, which isn't possible because I only have Linux machines.