Xerath's ult should work like Jhin's
When you are Jhin and you ult the screen zooms out to show the full range of your ult.
The same should happen to Xerath. It might need some time to getting use to but I think that It would be more helpful in the long run.
Or maybe at just level 3 because it has the longest range?
THERE YOU ARE! GET BACK HERE XERATH