Regarding high numbers at certain positions, something the coaches understand but won't acknowledge in public: Not all the players they recruit will develop the way they hope, and they also factor in for eventual attrition. That's not just at GT, that's at all schools.
As fans, we watch a guy's highlight tape and get excited about them, but as good as they may look on tape it doesn't always work out the way we hope. So as coaches, they just recruit the best players possible and let them play. The best ones will play, and the others will have to make the best of the situation or leave. At least at GT, you'll get the opportunity to finish your degree if that's what you want...unlike some of the other schools (Tennessee...ahem...)