User blog comment:SilencedSkies/Strategy or tactics? Or neither?/@comment-5193859-20130219215335

The AI changes aren't something you would notice unless you were playing consistently from launch.

In the first few months of the game, many of the enemies behaved a lot differently than they do now. Geth Rocket Troopers, Nemesis, and Cerberus Engineers would all hang back, far behind the front lines. It's even in their descriptions. "Cerberus combat engineers are specialized support units that assist primary forces while staying out of the line of fire." That's part of their official freaking description. But now they will run up on you right into melee range, despite not having a melee move.

Cerberus Nemeses are the same way. They used to stay as far away from players as they could, to the point of actually running away if you got even remotely near them. Now, they still run away sometimes, but they often come right up into CQC range and take cover 6 feet from you, and sometimes, they even run straight up to you, like the Engineers, as if they want to melee you, but they have no melee. This also NEVER used to happen.

At launch, Geth Rocket Troopers would stay far back from the front lines, like Nemeses, and fire rockets from a distance. I even used to see them mess themselves up if they accidentally fired a rocket into their cover, causing the rocket to blow up in their face and either killing them, or severely damaging their shields/health. But at some point that ceased to happen, and they started behaving like Geth Hunters. Coming straight into melee range, and their rocket no longer injures them or even staggers them if they fire it at something a foot away from them.

There are other subtle, but noticable changes to other units, but those are the ones that stand out the most to me.

And this was all in response to people "farming" on Firebase White, and other tactics Bioware perceived as "camping." Their solution to this problem at some point became to turn every enemy unit into an aggressive cover buster. It didn't really work that well though, so that's why they introduced the Geth Bomber and Cerberus Dragoon. The reason those units are some extremely obnoxious is to deliver players a message from Bioware, "camping is wrong, you can only play the game the way WE say you can."