My biggest points of difference were the nature of his resurrection and his role as an antagonist or ally. To the first point, it wasn't even slightly clear that he was resurrecting in response to the roars of his kin--I thought he was merely mocking the PC for following the stars (using divination to predict his coming) before admitting that, yes, he is returning to lead the war against Ishgard. Then, when he strips the PC of Hydaelyn's blessing, I thought he was just doing it because, 'f**k it, the blessing has gotten so weak anyway that I'll just make life more difficult for you!'

So yeah, nowhere close to the intended meaning that Midgardsormr wants to prepare the PC to became an even greater hero, one who could turn the tides of war, and also no reference to the fact that it was his seven sons who stirred him from slumber. Count me firmly in the 'Localization took this too far' camp.