Thank you!

I figured out the Lock Screen clock font change, at least.

You have to make a new Lock & Home Screen set. When you make the new one you’ll be able to edit the clock font by pressing the widget area. The problem was, you can’t edit a currently existing one. Just press and hold the Lock Screen to start.

Nothing to add, but I also came here to see if there are any tips to fix that godawful enormous lock clock. Feeling your pain.