I love that a lot of people picked 7/8 - it is hard to get it just right. I think your division worked very well as the 7/8 felt decently natural. I gotta admit that I got lost a bit at 0:56 - although this part, which you call "kinda polyrhythmic", surprisingly does not sound too bad. I feel that, although there is not much variation on the theme, you do incorporate it quite nicely, so well done :D