See I don't mind "not level" so much, for myself. If I'm towing a trailer and it's not level it's because it's probably for a small car so it's probably in the sub-500kg range and its axles are lower than my towball even with the air suspension down as low as it will go.
The weight balance can be all to hell, it won't matter - it's not going to be long enough or heavy enough to push a two tonne Range Rover around.
Anything that's an appreciable fraction of my wheelbase between the hitch and axle, and over a tonne? Yeah I'll take a little care over getting that set up.
I tow 3500kg on a braked twin-axle trailer fairly often. You'd notice it was there, especially braking for a junction at the bottom of a hill, but with the weight a little forward and maybe 50-70kg on the hitch the major sign that anything is there is the trailer light telltale blinking when you indicate ;-)
