So you have nine fast (well fast enough close to the ground) displating in close formation or breaking off for wide hi speed formation rejoins or position and running in for singleton passes and they should be expected to have a third eyeball to track random GA movements helis etc in the midst of all that. I would think they ahve more than enough to do without risking any form of conflict avoidance manouver.
Surely thats vastly more complex than a single or dual display in temrs of concentration needed and area of Sky occupied