I like the 3 spring setup myself. My M&G Yankee Whittler is a 3 spring. It allows larger blades in a more compact package. Plus lets my large hands get a better grip on a small knife.
I actually like the 3-spring knives and they're some of my favorite GECs, especially the Weaver Jacks. M&G too. Would love to see that one with 3 full size blades. (drop the pen blade & add a sheepsfoot maybe)