I had rotated my tires at 7,000 miles.I traded it around 12,500 only rotated 1 time.I do all of my work on my vehicles.I've been working on cars for the last 25 years,thats what i do for a living.I wish i was doing something else.
About that pulsation while braking. It frequently gets blamed on warped rotors. The rotors will have to be replaced but it is for another reason. Hot spots. Thermal judder is caused when the friction material, (rotor), has heat cycled unevenly. The metal at that specific location on the rotor has been tempered and now has a different hardness.
What's happening is: After a hard application of the brakes and the car comes to a complete stop, the brake rotors must cool evenly. The metal where the pads are locked onto will not cool evenly. That is where you will get a hot-spot.
Try creeping after a stop, at least hard ones, just enough to keep the pads moving so rotors can cool some.