So I read this in the OP...
Having played a villainous warlock on Skal, and not wanting to participate in the kind of RP that the surface offers (no hate, just not my cuppa), I naturally chose to go to the underdark. The first many RL-days of my characters underdark career, were spent making sure I had the accept of the powers that reigned at that time, to stay. Then I spent a few more days learning enough Undercommon to get by without running into the whole "You no speak language, collar now or die" spiel, every time I went somewhere.
After a week or so of situating my character, I finally start making allies for grinding and such. Huzzah! My villainous warlock has found his place in the world!
... and this actually makes me want to try that as well. Seems like an interesting place. I never played in Grayport so what the heck.
But then I read this...
Now imagine my dispair, when almost every zone that has any worthwhile XP for underdark characters of late teen levels / beginning epic levels, also has a very high chance to be affected by the Faerzress. Now, I don't mind when the volcano spawns, or the random stuns, imprisonments or losing half your coin - that's all part of the charm of wildmagic. However, another system was put in to act as an extreme deterrent for surface casters going to the UD for grinding. Every time you proc a wildsurge as a surface (non-shadowmage) arcane caster, which is quite often as a warlock, you have a 50%? chance to take roughly 60 damage of non-mitigatable damage, that also stuns you. My 300+ HP warlock, almost killed himself on the first pack of Crinti when trying to help someone complete their writ. While I understand that the Faerzress SHOULD wreak havoc on non native UD characters, completely barring migrating surface arcane casters (by making them take immense damage and a stun) from doing anything in the underdark does not, in my opinion, do anything good for anyone. The crazy randomness of wildmagic is dangerous enough.
and I'm trully left wondering why casters got screwed so hard while mundanes basically dont care about this. My supposedly mundane character can just ignore the second paragraph of the OP and go along his day. Seems strange.