I am noticing changes in BT connectivity. I have an I8 on IOS 13. There is a distinct difference now. Before the current slew of updates, I could only correct a disconnected state by restarting my watch and then the wearOS app on my phone. Now when disconnected (my phone and my watch are often out of BT range of each other), simply starting the wearOS app generally corrects it immediately. I also had an issue where clearing notifications on the watch wasn't working. Now its pretty reliable.