Hi Kazzy,
I used your technique when I (just recently) made the alternate block, instead of the Feathered Star block. FYI: there are 137 pieces in the Alternate Block, counting the 4 final borders.
I can honestly say that without using your technique, this block would not have gone together so easily. I didn't flip any of the pieces, which is pretty amazing, due to amount of pieces in the block. I didn't need to unsew anything! And when it came time for trimming, I was just trimming slivers of fabric in just a few cases.
I can understand why I didn't flip any blocks (I can be a bit dyslexic at times) but other than using sizing like I own stock in the company and using the Flying Geese x 4 ruler for my geese and 1/2 square triangles, I can't explain the accuracy of the piecing.
Oh yeah, I do sew slow slowly, in trying to keep the 1/4 inch seam allowance. I quilt because I enjoy the entire process, and it's not a race. That stress is saved for my job.