Necromancy is generally frowned upon, since it often results in things coming back 'wrong'. With that said, I think it'd make for a pretty cool job in the future as other MMO's have managed to make it work out well and the game would benefit from offering something darker as a playable job - even if meant being a secretive limited job. A full job would be my preferred route, though. Still there's plenty of appetite for such things as the popularity of Demon Hunters, Death Knights and Warlocks in World of Warcraft show - to say nothing of the equivalents in other MMO's/single player RPG's.