I have no issue with multi pins. And I have no issues out to 30yards with a 500-600 grain two blade set up. I didn’t aim for the shoulder but it obviously happens. However, I think the chances of hitting that exact same spot are small. I practice a lot. I want to be as ethical as possible. I feel out to 30 is completely doable with my DL and. Two blade or even single bevel. I prefer everything within that classic 17-23 yards which most bow kills happen.
I would definitely make the switch to two blade heads. Given your setup, I wouldn't prioritize maximizing cutting surface over minimizing energy required to penetrate the target.