Good, the word "tracking" is a lot scarier than "ad", should make most users think a bit harder about the choice. However, it's highly irresponsible for them to tell users to do it, as it's a switch, not a whitelist (which is good since that would eventually defeat the entire purpose). I think the best you get is disable for a session.
Well, guess they changed it. Maybe anyone careful enough to turn on Tracking Protection already knows enough to never whitelist, no exceptions. Whitelist just Google and Facebook and you're basically back to where you were without it.
