I believe that the Headhunter dial has several turn manuvers on it. There is no way to avoid a 45 degree cone at range 3 if your opponent wants to throw some shots your way. Besides, nothing stops Blount from capitalizing on his ability through deploying at an angle in the corner. There is really no way to avoid his range 3 shot other than killing him first, but 'just kill it before it does anything' is obviously a desperate argument.
Blount is PS6. Most ships that people toss stealth on have 6+. If Blount can shoot at the stealth ships, odds are good the stealth ships will be able to shoot at Blount, as he doesn't have nearly as much ability to stay out of firing arcs as the stealth ships tend to have. And most of them will shoot first too. At 4 THP and 2 agility, Blount is not going to survive that kind of focus fire long enough to shoot much.