On the contrary.
..., if you retreat after losing about half the squad, depending on faction, you'll pay the same or more for reinforce, so on the long run, more numerous squads retreat just as often and pay just as much.
A 6 model squad need to lose 3 entities to be half HP a 4 men 2. So bigger squads retreat generally less. The cost per entity lost or even per EHP is also less for bigger squads in most cases...
You can see that in end game model loses statistic, side with more numerous squads loses more models unless its a stomp, cost to reinforce squad fully is relevant here.
Again rather irrelevant since smaller squads tend to have smaller those are killed less but they also are more XP and can be wiped out easier...Unless game statics provided how much MP a player has spend on reinforcing infantry there is little relevance...
Ever played USF vs ost sniper?
Again rather irrelevant.That has more to with the sniper and less with the squad size. Sniper are allot more effective versus smaller squads and that is why Osth sniper fires faster...
How hard is to wipe unit depends purely on 3 things-.
Simple
NO, it actually depend on plethora of things among them how close all squad member are located compared to AOE of explosive weapon...
My argument is simple and still stands:
"Having less entities in a squads, hardly gives any advantage to the squad, while having more entities does."
If in your opinion a squads will less members has a notable advantage pls explain what that is...