For what its worth, my FP3 works fine after the update. No higher battery usage, no freezing, everything runs smoothly - so I’m happy. I’m also quite happy with the new look. I use Lawnchair, so I am not sure what is down to that. As yet I’ve had only one issue with the dial tone that has gone into hiding and has been replaced with a big silence, but I can live with that.
Thank you to the programmers who have done all the work.