I installed b4 and the watch is slow and actually locks up now requiring a force reboot. When it first launches, it works just fine but after a few minutes, it starts to bog down and eventually requires the force reboot. Unpairing and repairing doesn't fix it.
I wonder if there is a weird process causing this. Is anyone else seeing this?
You aren't using the Simple watch face are you? I've read that using Simple can/does cause issues.
I've found that Modular works well (as long as you don't use the weather complication) and Utility.
I'm using the Utility face with sunrise/set, weather, and calendar. I've been having the random lock ups and slowdowns since wOS2B4 install as well. I notice often the temperature isn't loaded on the Utility face and sometimes the sunrise/set info on the Utility face is not populated.
I have not tried to use another face yet.
Yesterday, I had the watch lock up at least 4 times which required a hard reset to get it responsive again.
I had the same issues as people are describing here until I switched to X-LARGE watchface. I noticed that all the very simple watch faces with just the time or time and date on them will make the watch a lot more responsive. Siri always responds fast when pressing the crown (which is not the case with any watchface that has complications on it). So there's definitely a bug with complications that drains the battery and slows down the processing a lot.