I do the same as Tartan. You take a few stitches out and you can swirl the seam to lay flat. It looks like a tiny pinwheel. This is a technique that EB uses on her PBS quilt show QIAD.

That is what I do also.

I clip seams when necessary.

I'm a clipper too. It really helps to have the quilt lay better! Although I love bargellos I hate the thick seams and same for PPing!

Somewhere awhile back, I read about someone using a rubber mallet to pound bulky seam intersections down.....so a rubber mallet became a new "sewing tool" in my sewing room. I have tried it and it seems to work, and have been able to sew thru that intersection without any problems. I was concerned about tearing the stitches by pounding but it did not appear to damage any of the sewing.

I've never had to clip a seam for any reason, but I work out a pressing diagram before I ever start piecing. Works for me. :)

There is a correct way to sew intersecting seams so they will swirl right every time. Sometimes you get one that won't swirl so the seams will be opposite each other. Bonnie Hunter explains it the best:

Scroll to Tip#2 http://quiltville.blogspot.com/2011/...a-re-post.html

I also spin the seams & haven't had any issues with them even after many washes. Here's the video from Fat Quarter Shop that I learned from:
https://www.youtube.com/watch?v=Ajw2PqcFLs0

I turn the pieced section over, finger press, turn back so the seam joints are on the bottom, cover the heavy joint with a wash cloth and pound on it with a meat tenderizer. Puts them right in line

I use Frey Block all the time in my embroidery. And yes, it does dry soft & flexible. Never had any problem with it showing on white fabric after it dries.