Lots of quests at present revolve around doing good deeds - or at least, doing something not particularly morally objectionable for profit. Probably the most evil thing you can do in EFU quests at the moment is intimidate the folks in the Spider's quest for money.
I think it'd be good to see some more evil quests tailored towards monstrous, villainous or otherwise dark PCs, that lets them roleplay their true nature alongside a group of like-mindeds. If you stick true to your character's nature as an asshole and refuse to do quests where you're helping someone or otherwise being moral, your scope of opportunity for adventure is actually somewhat limited.
In other words let me burn villages and slaughter helpless peasants please
Agreed, this is the underdark, I'm surprised theres not a lot more "dark jobs" available to evil folks to do! Such as Duergar maybe hiring people to take a boat out and perform an act of piracy, or maybe a solo quest for aspiring assassins that they hire them to kill a "contract" that is spawned somewhere in a full pvp area, but not around a bunch of monsters that is somewhat tough. Or heck, maybe a quest involving attacking a small settlement of refugee's who are trying to make it through, and you are given the opportunity to launch an attack on it, to take all that they have!
Orrrr, maybe, a graveyard quest for evil guys where they are hired by a necromancer to go in and collect bodies at the risk of angering its protectors, or the undead.. Sort of like a high level leaches quest for bad guys, and necromancers.
Perhaps, for higher levels, an evil wizard is hiring adventurers and mercenaries to allow him to teleport them to a pocket-plane or something to hunt down celestials to gather reagents for some manner of project he is working on. That could easily work with having a tiefling or demon that just wants you to take them out, but in the case of it being their rival force.
A lot of opportunity and ideas for evil quests, would love to see some
I'd love to eradicate a trouble-making paladin of Hoar on behalf of the duergar slavers he's been raiding. His perfectly benevolent disciples and freedom fighters...
add optional, morally-questionable parts to already-existing quests that reward you for being evil and soulless
or just some gould thugs hiring you to take out a ghetto of beggars who just want to live their lifes
I recall in chapter 1 a certain quest with an OOC disclaimer //Good aligned pcs should not take this quest.
Strangely this NPC is in the module and doesent offer the quest anymore!
Though I play an evil char ATM, I think the undead quests are dramatically reversed on this incarnation of EfU. Seems like all the best paladin quests are virtually untakeable by paladins. Goblin or duergar quest-givers, to be somewhat specific. There are some fun in-city quests for undead-killers, but some of the best are unavailable to real paladins.
Though I guess it's supposed to be harder to be a hero in our dystopian world...
A sort of evil gits / antagonists only quest might be an interesting addition for more fringe concepts that don't mind being particularly bad in exchange for an upper hand on the good guys. I imagine it'll have to be watched to make sure it isn't being abused, but it'd be a nice way for concepts that don't have access to the traditional resources of Sanctuary to have something that they don't.