I was going to disagree but you are right. I only watched some trailers and I thought Finn would be the main character. He even wields a lightsaber in the offic

I was going to disagree but you are right. I only watched some trailers and I thought Finn would be the main character. He even wields a lightsaber in the official poster, despite the fact that he received no training nor he had the Force and only used it because he had nothing else to use and his life depended on it. I doubt he'll use it in the rest of the series—seems like he'll join Poe Dameron.