Nerf the undead!
You obviously don’t watch zombie movies. ^^
In all fairness, solo story undead are crazy for some classes. Maybe a little balancing is needed.
The Orrians are the high-level, end-game content. They’re meant to be challenging and hard to get through, because eventually they’ll be fighting against gangs of organized players decked up in Exotic gear.
At level 75, you’ll definitely start to feel the weight. Re-organizing your traits, skills, gear and technique will get you through it eventually.
I suppose there could be genuine balance issues though.
The big problem / challenge of the end-game areas is that nothing is safe. Everywhere else, if you run for not too long, you’ll come across a few passive mobs that will give you a chance to shake your pursuers, or enough of them to deal with the remainder. Orr is the stronghold of the enemy. Why should it be other than it is?!
I’ll admit, I swore, the first session I spent in there. Then I started to adjust my playstyle, and I solo quite cheerfully now. And much more cautiously, rather than imagining I can just race through in a gung-ho fashion. On the Anet-acknowledged broken Engineer, too! Orr is challenging to solo, yes. The last thing I want to see is it being dumbed down. Oh, and no, they’re not all fast. All the brute-type Risen are proper zombie-slow.