I’m going to start by saying that a lot of my gripes will likely be quashed by simply fixing the threat assessment system. Just don’t call it T0 if there’s a strong possibility of encountering hostiles.If the installation is a military site, it will be patrolled by military grunts on "shoot first, ask questions later" orders. When they gather around your charred, twisted body, only then do they discover that you were there to restore power to their facility. (You can confirm this by scanning them!) However, it is easy to avoid them, especially at night, and also easy enough to run away from them by jumping on roofs/walls.
When leaving, try first disabling personnel turrets, base alarms, etc. Then you 'might' not get shot down after stealing plans/looting boxes. If in doubt, head out into the blackness beyond the border for five minutes before ordering your shuttle home. Have never needed to use shields - and only minimal injuries so far - and I'm far from being a season FPS vet...
Another frustration comes from some what I think are odd reactions. Yes, I’m at a military outpost on a mission to restore power. It’s a T0 mission, and I’m passing base security no problem with my provided level 3 clearance. I put the core in to power up the base and call an Apex. While I’m waiting, I get a message saying my shuttle is under attack and then destroyed. Suddenly, I am under assault by multiple base security. I run. They pursue. I outrun the ground personnel. But I don’t outrun the sentinels most of the time. But needless to say, and again repeating, if they’re going to murder me on sight, that is not a T0 mission.
Given that I haven’t been able to survive most attempts at simple support missions, I haven’t even tried the combat or illicit missions. I take that back. I did one exterminate mission, and it did not fare well. In that mission, I found that I was burning through plasma ammo too quick trying to get enemy shields down. Once I got them down, the enemy would immediately retreat and find cover. Annoyingly, their shields never failed to recover by the time I chased back over to them making my Kinetic assault rifle totally worthless. Felt a bit over done for a T1 mission.
Like I said before, I think I’ll be fine if the threat assessment is fixed.