this goes into the standard view that because they are vampires, they must be evil creatures. i think the standard vampire is evil, when being feral and a pack beast. but when in a more accepting society, they do not have to live in caves, feeding on humans like a pack of wolves.
mining would be greatly inpowered by vampires...
i can imagine a painting of a massive cathedral or window cleaning would be easier if you could innately spider climb. the capture of criminals would be a sinfully easy task with gaseous form and spider climb...
honestly, if the right methods and restrictions are employed, a caste of vampires could grow within a city.
1) no unotherized feedings, blood can be obtained from several sources and made available in clubs, bars, hospitals, etc.
2) no creating spawn without proper processes are met and filed with the magistrate/courts
3) the standard police/guards are equipped with magical silver weapons, to deal with the more aggressive, antisocial types