5) Steering wobble when braking at highway speeds. I've read the other blogs about this and have seen mixed thoughts on rotors versus suspension related causes. I do get a slight squeal when I brake anytime, so I think mine is probably rotors. Any thoughts?

Checked wheel lug nuts for proper torque, had this problem recently and came to conclusion after removing suspected wheel that had flat tire serviced that tireshop had overtightend wheel lugs. May not be same for you; also check thrust arm bushings since yours is high mileage.