The blur effect from liquid glass slightly, but noticeably, lowers the frame rate on iOS 27, as well. By turning on "Reduce Transparency" it became a bit smoother, more like iOS 18 was. God I miss iOS 18.
First thing I did was turn on reduce transparency - even on iOS 18. And Reduce Motion. I also disable high frame rate and keep it at the lower option of (I believe) 60hz.
Used to do the same on Android plus more (you can disable most animations in developer)
Also highly recommend going in Accessibility on iOS and changing the screen swipe or slide effect or whatever. Results in much faster transitions. And all of this has always seemed to keep the phone cooler and battery life working longer.
If you want to get deeper disable all widgets completely (delete everything off the far left Home Screen). Disable weather auto updating based on location (if you deny it access to location then the Apple Weather app can just be set manually to track specific zip codes or cities).
I also do not get the insane folder thing everyone has on their Home Screen - I delete them all immediately along with all icons and keep one completely blank homescreen (with a cool background) and 4 things on the dock. Then only one other Home Screen with just a few additional icons in the corner. If you need any other app just search or go to the screen far right App Library !
The folders were useful to me for years, aided by the macOS iTunes feature to view and rearrange things via drag-and-drop. Still annoyed that feature was removed.
