I think it would hurt, yes. The art style of the sixth movie and that of the television episodes differ greatly in terms of quality. It would be like writing a general story, then suddenly, on page seven, it gets super detailed then goes back to general. If you look at the movie and episodes, you'll see that they wouldn't blend together in a single showing. Also, if viewers saw the better quality of the movies, it could possibly cause a sense of indignation at why the episodes were not done the same way. When they are seperate, it is not so often thought about, but thrust movie and episode together at once, and it would be so obvious that it would make the episode quality really be looked down upon. It would be like putting a three-layer chocolate cake cooked by a famous chef and a little gas station cake on the same table and asking you to look at both. They just wouldn't go together.