Keed and I used to play quite a bit with the LAMBS people back in the day and they had quite good procedure for pre op :
For the first 30 ish minutes, players would do warmup stuff like squad manouvers / building clearing / convoy excersices / shooting practice with heavy weapons etc. During that warmup time, people with tech issues could get help from others and would have time to solve them while others were occupied doing something instead of sitting in the main. I seem to remember that some people got rather annoyed having to sit around for so long during last op, so I feel this would help a lot to keep the morale up.
Fire support :
+1 to that.
One of the best rounds I've had in Arma. Just sitting in a shed, taking shelter from the rain and sh*t talking with Jager. When called in, dragged the mortar out, fired some shots and then dragged it back in. I believe it did eventually get us killed due to arma being arma, with the mortar bugging out and firing at random while in the shed, but still. Good times.
Lead structure, cooperation and training :
Lead structure would be interesting, but as Fastjack mentioned, there are too few of us atm to have a fully functional CO and 2IC system for ops. I do think some form of coordination structure between squads should excist tho. I did have some tech issues during last mission and had to quit early because of it so I can't say about rest of the op, but one thing I noticed during our first attack on the village was that there was almost no cooperation between the squads. Everyone just went in at random without a solid plan. I think there were quite a few blue on blue incidents because of it which could have been avoided. After village got secured, no one set up a perimeter and after couple of minutes, an enemy patrol just walked in and managed to kill off quite a few people. The same with building clearing, some of the buildings weren't cleared and as a result people started to get shot in the back by baddies garrisoned in them.
I think, before going for an attack, squad leads should meet up and agree which squad is going to clear which part of the city and make sure that members of their squad don't run off into other squads sectors to avoid blue on blue incidents.