Looks like the Tag designed complications are assuming that because I selected English US as a language, I want Farenheit as a temperature this was a problem a long time ago on WearOS, but has been fixed.
Also, looks like Tag complications don't know about UTC as a timezones, which WearOS does.
As a follow-up to my previous comment, I have not been able to figure out a way to have the screen turn off while charging, except by turning off the Always On feature. The brightness setting at night is also not controllable from what I can see and very strong in a dark room.
Battery life so far seems improved vs my previous 41mm, but it will take a few more days of playing around to confirm.
All in all, I am very happy with the E4 42mm... A significant improvement over the E2 41mm. Can't wait for WearOS 3 and for the Tag software updates that will fix (hopefully) a few initial issues and missing watch faces.
Here are a few more pictures of the 42mm.