Sorry but I'd say -1 on this one. The Extreme's main selling point is to explore the outer world to get whatever you need while exposed to the constant dangers of a possible PVP situation or environmental hazards; with the addition of the dungeons and the enabled PVP in wild, it promotes those dangers.
As mentioned above:
Dungeons would be relatively useless once jobs are implemented, considering the risk and reward of both activities. If we're gradually removing the difficulty from Extreme, we might as well reset towny classic, play there and call it a day.
~ @Blazetop
Denied - jobs are never coming to Extreme as they are something which must be done very carefully and do not fit the spirit of Extreme. They will continue to exist on the normal Towny world.