Well it takes years of development to develop a quality, dependable bow (crossbow). They jumped into the market with a very high preformance bow without much history behind it. Remember that crossbows are not guns. With guns the speed and power comes from the shell, no stored energy. With the crossbow, you have to load all the energy into the bow and it is stored in the limbs until it is released. This is a violant action. Sometimes this violance can damage parts and sometimes now, espically if there has not been enough testing.

Maybe in a few years they might get it correct. But the more power, the faster you go, the more chance you will have that something will fail.