I could tell you, but I'd have to kill you; your choice. Just kidding! I'm working on a piece right now, so I don't want to spoil the fun.
Depends on the athlete, all though I too try to train my athletes throughout all ends of the strength spectrum, but putting more focus on their areas of weakness. Typically, however, I see too many bilateral strength movements in the gym. Don't get me wrong, I want an athlete that's hella strong (which squats and pulls will make you), but they have to be able to carry that strength over to on-field movements as well. Again, more in the upcoming piece.
Yes, but I believe Kenn does more total body workouts with less leg work per day, while DeFranco does one leg day, 2 run days, and his strongman day. Again, you have to focus on their weakness. If they are really strong, 2 leg days instead of one isn't going to make a huge difference in performance. But, if you cut their lifting down to one day and focus on the running and movement, well now you've just opened up new avenues for this player. I know people get tired of me saying this, but it depends on the athlete in question.
KB's? A good medium, but overrated in today's market. It's a great compliment or filler, but I don't feel it's the basis for a great workout by itself.