The only time I've noticeably heated up my disc was after making a couple runs down (and back up of course) an incredibly twisty, steep, 1 mile+, fast mountain road. The effects of gravity dramatically compounded normal braking effort. Other than that, including at a tight, technical track, I've never noticed any odor or fade from the front.
The rear shock should be at the top of your upgrade list. While it's not rebuildable and has limited adjustibility, the shock off of a second generation B12 is effective and cheap. B12 owners often upgrade to Busa or aftermarket shocks so there are usually some available.