On one hand, I love the Interwar period for action adventure. Porco Rosso is probably my favourite of the Ghibli films I have seen. I also think they did a good job of translating his famous top not to a somewhat more detailed medium.
On other hand, I don't like all the action that appears to have been added. Tintin was never afraid to resort to good old fisticuffs if the need arose, but he was more known for thinking his way out of a bad situation. I can't think of a single one where Tintin or any of his associates would resort to a rocket launcher.