This is my first time playing any of the ARMA games, and I must say, ARMA 3 is very enjoyable. However, this last mission kinda ruined my whole experience with the campaign. I have tried to complete this mission for at least the past 5 hours, but have continuously ended up having to start again from the beginning because CSAT hit squads would suddenly emerge from nowhere and shoot my entire squad down in a matter of seconds. The AI is slightly too powerful at range, given the darkness of the map and the usual engagement distance, even on normal difficulty.
The "ending" of Kerry being killed is pretty pointless, may as well put "better luck next time". Playing through this many missions just to be put down like a dog, who would possibly settle for an "ending" like that? I also expected an explanation of Miller's identity and mission, considering that this is the "ending". I chose to help Miller because I was curious about the plot, and I was mightily disappointed.
The lack of saves is perhaps the biggest waste of time I have ever encountered. I have given up on the campaign after my final attempt, in which I managed to rescue both the NATO and FIA squads, and made it to the heliport with all squad members alive, only to find nothing there, and nothing at any of the nearby ports, then being assassinated by another CSAT hit squad on my way to the next heliport.
UPDATE: I ran this mission again using fast moving tactics, and I actually got through most of it without issue. But the sniper at the solar farm continuously headshots me in my truck from any angle, any speed, and any range. I even got as far as the heliport with the chopper IN SIGHT this time and my 8 man squad in line formation, then suddenly BOOM HEADSHOT from some bastard in the grass. The mission is beatable, I'm sure, but I think I've got better things to do.