Nah. In this world those gods don't exist anyway. Oliver has his powers now because his character had them, not any more because of an ingame god. However learning new things would mean training just like in real life. 

As for doing good, well, it's not like Sanguine doesn't want to do good. She just wants to do it in a different way. xD Realising what kind of position he's really in will no doubt be quite shocking... :P Though it's not like the signs aren't there. A vampire necromancer guild master, half of the head npc's being generally evil beings, an arena full of monsters and evil creatures... He might realize it a little more after the first fight. If not, definitely after the second one. >:3