You can think of hot zones having more than one use.
Yes, they have been put in to up the xp level to draw people to various zones, some of which would otherwise see little action. But I like to think they also serve to draw away the masses (read: asses) from the rest of Norrath, leaving a zone you might want to explore, reletively empty.
Sure your favorite zone might get picked as a hot zone, and a few hot zone patches ago they left them the same for too long. Hopefully they will change them sooner now so if your favorite zone gets tagged as hot, you do not have to suffer the /ooc wars too long. Might be a good time to explore a new non-hot zone.