Sequoia towing at max for over 5,000 miles - comfortably

I would seem to me that if you cross the weight scales with all the axel, max cargo and total combo weight in spec. you should have little difficulty towing.

You are doing what the combination was intended to do.

My 25 ft. Dutchmen puts my F-150 near it's limit and I have towed over 30,000 miles. I even used the stock "P" tires.

I am sure there are advantages to bigger and stronger TVs and there is significant wear and tear on any TV when towing near its limit. However, as you have found out, it will do the job.