In my opinion floorcraft has relatively little to do with skill and experience, and a lot with attitude. If a leader sees the other leaders as part of the same team, where we all together create a dancefloor they will have good floorcraft. If they think of other couples as obstacles they wont.
It is the same as in traffic: It is crowded, and chaotic, but it is like a school of fish where the goal is to contribute to the whole dancefloor moving in harmony, not a chariot race where the goal is to block the people behind, defend ones position against the people at ones side, and attack and overtake the people in front. Less Ben Hur, more Nemo
The best exercise to develop that positive awareness of the other dancers is to consciously try to see and make eye contact with all the leaders around oneself. Think "how generous of them to let me dance", smile, and be generous to them in turn.
Gssh