Well, isn't this compositor related? I've never had any window placement issues running Sway (i3 for Wayland). I never used night light on that machine, so I can't comment on that particular point, but the thing seems to work just as well as i3.

The only problem I have is with JetBrains IDEs, which seem to have shaky support. They're usable (meaning you can code), but the experience is so wonky that I basically consider they don't support Wayland.

The reason I switched from i3/x11 is that we've got some 27" 5k screens at work that are basically useless at 100%, and Sway handles different scaling settings flawlessly (except for IntelliJ, which seems lost).