To be honest even if some of it is in 1080i I doubt many people would notice the difference with their own eyes (unless they have a massive screen). It still looks great and better than loads of substandard 1080p film transfers.
1080 is 1080 is 1080. I don't care if it's i or p, you CANNOT tell with the naked eye. People who say they can see a difference are the same people who tell you they can spot individual frames being played when watching a movie. Baloney! The only time i or p matters is when you are compressing the file. Then, interlacing is very noticeable unless you deinterlace.