Is it because the sweet spot is larger? Does a larger sweet spot have a hot spot in the middle that causes you to lose control? Does the large sweet spot cause you to get lazy about where you make contact and thus somehow lose control? If a racquet is stiffer or has some new trampoline technology like woofers or O-Ports, the sweet spot will be bigger. Does that inherently mean it will have less control? Would stringing looser have the same effect on control and power?