The dog looks like a cardboard cutout coloured in by a two year old with a brown crayon and a bottle of mustard, they really couldn't do any better with the graphics?
And you can't kill the dog.... REALLY? REALLY?
It's stupid, who needs guns and armour when you have an invincible dog that attacks enemies for you? Why not make your character immortal as well? How much fun would that be?
let's remember that this is a fallout game. assuming fallout 4 will be like any other fallout game, your companion does not have to follow you if you don't want them to. you can also pick up new companions and pets if you prefer them over the current ones you have (or at least i hope fallout 4 will be like this). all of the companions and pets in the earlier fallout games couldn't die either, they would just go unconscious if they took enough damage. i guess what i'm missing is why you think the dog is going to be unrealistically overpowered. sure, companions and pets are really helpful, but i don't think they are going to make the game all that much easier.
Still not a fan of the dog. Dogmeat was cool, but it wasn't a companion they forced you to have a story with.