I am very sceptical about this campaign.
The description on the sas forum is completly different from what I have read on early war missions
He writes that he intentionnally set lot of collisions : at least in the french service, this is wrong, usually planes took off and flew separatly, and the risks were very limited (they only occured during landing phase, usually following a mecanical problem or battle damages).
The formations we see on the pictures are not very realistic neither, creating a completly irrealistic wall of fire for begining of 1916.
Even when a number of planes were sent together on mission such as bombings, they were flying within visual sight at best, but not as a close formation and were fairly vulnerable to ennemy interception.
The capacity to maintain this kind of formation only appeared at the end of 1916, begining of 1917 earliest.
This is fundamental because indeed, the famous bloody april was due to the fact that the German were able to have fairly large formations of scouts (say 5-6 planes) routinely flying together coordinated, whereas the entente could only have 2-3 planes max flying together.
So, the missions are not at all representative of what happened at the begining of the war.
And also, CUP in general is very badly optimized and I basically stopped playing it.