The construction in question is not new neither invented by me. I have seen this type of shoulder many times and now decided to try it out.
I like thinking about various constructions and what features they have. As everyone, I have my favourite ones. I decided to try it with a thick yarn (50 g/100 m), cotton-linen blend. For the sake of simplicity, I am making a summer top. This is the beginning:
The cast on edge is the width of the back neck. I made some short rows to shape it. In every right side row I increase 4 sts (2 sts at each edge). Of course, it is possible to increase 1 st at each edge in every row but it is a matter of choice (the sum is 4 increased sts per 2 rows anyway). Once I had reached the right width of the back piece, I picked up stitches for the front pieces ad shaped the neck opening.
This is how the back looks like now.
The cast on edge is the width of the back neck. I made some short rows to shape it. In every right side row I increase 4 sts (2 sts at each edge). Of course, it is possible to increase 1 st at each edge in every row but it is a matter of choice (the sum is 4 increased sts per 2 rows anyway). Once I had reached the right width of the back piece, I picked up stitches for the front pieces ad shaped the neck opening.
This is how the back looks like now.