Okay, first of all, I don't see how you can compare an instanced raid to outside world events, the two aren't even remotely similar. Secondly, while Orr might not be designed to be a "walk in the park" the problem is no one is walking in that park in the first place. As I mentioned, if people were actually doing the temples so that they weren't contested 99% of the time that would make a big difference in how difficult traversing the map is. Likewise, 3/4 of the waypoints wouldn't almost always be contested (the 2 non-contested ones they added were not sufficient) and nearly every town point of interest wouldn't involve rushing into dozens of enemies because there's no one around to clear them out on an even semi-regular basis.
It's not as if Orr is obsolete content. As it is, the rewards aren't worth people bothering to do the DEs and the DEs are scaled too highly for small groups. The result is a relatively barren zone (except for camp farming, which is also slowly dying out) that few people bother with except for map completion. So, as I stated, it is unnecessarily difficult given the circumstances.