I agree with PaperPrincess. Try removing paper from the seam allowance where the points meet (about a half inch should work). It will get rid of some of the bulk and after it's sewn getting all the paper out out can be really difficult. I'm still fairly new to paper piecing but the teacher at the club I go to is very, very good and gave me the suggestions and it really helped. It's hard to tell how accurate the picture is but I also agree that the finished halves don't look quite straight. Tartan suggested pressing the seams open and that should help too
It's a beautiful block and I love the fabric choices!