Had the aircraft both assumed a "race track" like pattern.....taking off in he same direction as all other aircraft on the race track were using....there would have been much less a chance for conflict with all the landing pads being in front of the landing aircraft as it was on final approach.
The two aircraft were headed in opposite directions which seems a bit odd to me.
Also....one aircraft did not have floats which may have played a role in the flight path choices available to that aircraft.