I can see that Thranduil might well be a tad pompous and prone to contorted grammar, but the decision to lead with the sentence 'you seek that which would bestow upon you the right to rule' is a tad odd.

I'm reserving judgement on Smaug - after all, we only get a quick shot of the side of his head. But I had been hoping for a more Tolkienish Smaug - after all, Smaug is one of the few things where we don't have to rely on illustrators, Tolkien drew him in some detail. But perhaps the Tolkien version would not be scary enough for modern cinema audiences.