The tweener handles are in that just right category for me, not to large not small. I wear a large glove, the only time I've had issues with em is when my 16 was new. With the factory edge and choking up a lil the pressure applied while feathering created a hot spot on the area between my thumb and pointer finger. That was resolved by reprofiling it and very lil pressure needing to be applied.
I've put off getting the 15 for so long simply bc the blade shape didn't appeal to me, but with em being gone practically everywhere I figured it's now or never. Besides the wifey hates it when I pull my 16 it and start using it the kitchen, (slight germ aphobe when it comes to raw meats) so the 15 will likely live in the kitchen.