It's hard to reply to someone who's asking for a critique because we all prefer to give compliments! That said, I think my immediate visual impression was that the blocks without sashings around them looked like they needed sashing. I think it's just a sense of things not being balanced, like the way you feel when you see a picture that's not hanging quite straight.
Other than that, what's not to love? The colors work, the diverse blocks work, and it looks like the workmanship is excellent.