Why isn't Xfce's layout easier to change?
Just because you can click, right click, set some options and stuff... doesn't mean it's easier to change the default layout to match your needs!
I might have irrational expectations, but once you can change the layout of some desktop environment "the easy way" — i.e. by using the mouse, not by manually editing config files —, shouldn't you be able to experience some ease with that?
Here's a few distinct layouts you can have with XFCE:
The "classical" layout, commonly seen with KateOS, Zenwalk, Wolvix, etc.: