hmmmm...maybe although im still with the whole whos dead is dead and although we may be seeing or hearing from them again they're going to remain dead.
Although this wouldn't make a difference to the ending, well perhaps it would have meant that Dumbledore retained some of his strength why didnt Harry just use the water spell and fill Dumbledores mouth with water? why did it have to be a cup? because in the 4th book Fleur put the fire out on her skirt, so why not just spray it in to Dumbledores mouth?