Thank you.
Crazy how far boxing defense can take you. Sadly, most MMA fighters have yet realize this. Anderson and Gus sure have though (more so Andy).
Gus still has a lot of holes in his boxing defense (which you kind of alluded to). He does that sloppy, fully extend your arms in your opponent's face thing too much. Which is OK against shorter guys, but against someone with Jones' reach or Machida's "reach" with his techniques, can get you caught.
Jones does this a lot, and that's how Machida caught him in the first round of their fight. Gus might have the chin to get away with it, but it's still a hole none the less.