I have posted this on the iL2 bugtracker in the features section :
The present method for joining, side selection,briefing , launching & seeing the results of the Co-operative missions is not practical for those wishing to run or participate in Coops ,run online wars or design training missions.The old GUI was more practical and easier for both Hosts and players.
A poll on the 1c forum backs this up .
If you find this is also an issue you wish to be adressed please add your vote as Luthier and team are looking closely at the reports made on the tracker.
Register > check e-mail> sign in.
Click the green up arrow > vote done.
Many Thanks .