I'm sorry-I have extensive towing experience-I'm not debating this with you.
We can disagree and let the OP try to band aid what he has broken.
I didn't say it was optimal.
No different than having stock springs and airbags, or sumosprings, or any number of load supporting springs. They all up the spring rate.
Now, maybe has too much spring, that is certainly possible. Without knowing the spring rate it is hard to say. But you can't just wholesale dismiss it because you think they're too much. Maybe they are, or maybe it is another way to solve a perceived problem.
Either way, it is what he's done.
And there are other people walking the earth that can have more or the same experience as you.