Interesting and weird. Not really seen any complaints here like yours with beta 5. On the contrary most are seeing improvements over 16.0. Odd how different people have such different results with same hardware and OS versions. Happens all the time tho.Hate to say it, but 16.1 Beta 5 feels like a real dog. Seeing some nasty Wifi and 5G+ data lags, some graphical delays from the native OS, plus some real data churn / lag when pulling up some more complex stuff (like route calculation on Maps / G Maps). Whatever they did from 16.0 to 16.1 (heck 16.1 Beta 1 to now), its balance has turned to crap.
Using an iPhone 12 PM - no problems when using 16.0.