Holy poo, and this why America is viewed as pompous and ignorant. You do realize straight-line speed and size are NOT crucial measurements for a successful soccer player, right? Lionel Messi is a horrible athlete (sucks at Basketball and Track and Field) but makes the best defenders look silly with his dribbling, agility, passing, timing, and low-center of gravity. Cristiano Ronaldo (who is a far superior athlete in comparison) ran a 4.7 in a 40 yard dash and couldn't bench 200 lbs yet he embarrassed your defenders with his dribbling and passing in that World Cup game. Gareth Bale, on the other hand, is a Cheetah (ran a 4.32 in the 40) and strong as an Ox (can fend off multiple defenders) but he can't hold onto the ball or create his own shot or finish for that matter.
Nice excuse. Soccer has been huge in Peru, Iraq, Bolivia, Indonesia, Mexico, South Africa, etc and those countries haven't come close to a World Cup. The US will never win a World Cup... until German, Spanish, Brazilian, Argentinian, Italian, French, etc nationals choose to play for the USMNT. This excuse has been alive since the 70s.
Against Star, Unger has come out looking like a JAG. Nothing is going to change here. Putting on the Saints colors doesn't make him magically better. I suggest you watch The Panther-Seahawk games and see for yourself.
That's a little naive to state. One definitely needs some type quickness to create space or openings. Pump fakes, spin moves, step backs, etc can only get you so far at this level. Athletic defenders like Leonard, Whiteside, Green, Butler, LBJ, Monroe, Aldridge, Howard, and D.Jordan would smother Frank. Kaminsky has a good handle. That'll translate just fine but he needs to develop some form of agility to compensate for the elite athletes who will be up on his grill. It's one thing to shoot over a 6'3"-6'6" forward or guard, it's another thing when you've got a 6'7"-6'11" forward or center who can move twice as fast you.