Also I believe it doesn't last the entire game. They've shown the event that lifts the edict (the thing that kills everyone in eight days) in previews and it would be rather odd to show off the end of the game...
Interesting fact gleaned from all these previews: Tyranny has a Fallout-esque timer. (Eight days before everyone dies. Time only passes when you travel between maps.)
Video is only available for subscribers. Welp, that seems like good marketing
EDIT: Oh wait there is a free youtube version. Not keen on effusive youtubers even those as elderly statesman-like as Day9 but I guess that's the world we live in.
Original Sin 2 sounds too good to be true: http://www.polygon.com/features/2015/8/26/9209649/divinity-original-sin-2-preview-kickstarter-reveal-feature-gameplay-hands-on. It's only in pre-alpha so it probably IS too good to be true but imagine if they actually deliver on that promise.
There's no reason why you couldn't play a passionate priest. You can easily max out three separate dispositions. Though it is odd that they didn't put in a deity that was pro-passion - Hylea would definitely want that in her priests - but maybe that'll come in an expansion or sequel.
I kept it for the guy at night and, as far as I can tell, there is no way to give the shipment to him and the only way to actually complete the quest is to return it to the blacksmith.
I don't know why you'd want to keep endlessly messing with it, reconstituting it and rebuilding it when it's right over there; perfectly playable and as its makers intended it to be, warts and all.