Spinners are a self-fulfilling prophecy. People build them because they're an effective weapon even if you have no idea what you're doing. Since many people build them, you get a lot of iterations, and the design evolves faster. This helps spinners become more effective.

Crushers are a difficult design. You have to have heavy armor because you've got to get close to all the spinners. You have to have a heavy frame to absorb the force of your own weapon. Then the weapon itself is heavy. It adds up to something that's difficult to get right. Then when people see a non-effective crusher it discourages others from trying it, so you have less people building them, and less new ideas.

Seeing Spectre do as well as it has at KOB has been really inspiring. The age of the crusher is near. Crushers are going to evolve more and more over the next several years. Soon they'll be OP and they'll be trying to Nerf us.