Here's the latest from the UFO: Extraterrestrials website.
Remember in Enemy Unknown how hunting for the last alien on a mission could be troublesome? That alien usually would never move, thus forcing you to search the entire battlescape again for the lone holdout. (I attribute this to a massive morale loss). Well, the UFO: ET team came up with a rather creative solution: the last one or two aliens would go into a "Kamikaze mode". I would guess this means the alien(s) would actually move to engage your troops instead of being "frozen" to a spot on the map. A suicide mission if you must.
This has some important implications on your game plan. Instead of using the same type of strategy, you must change tactics near the end of the mission for the inevitable mad rush of the aliens which are left. Of course, if you know what is going to happen, you can prepare for it too. Nevertheless, it will be an interesting fix to this age-old problem. You can read more about it here
My X-COM Patch Kit For UFO Defense | Emergency XCOM Meeting spoof on YouTube
Zombie: Empirical data's your only man, when formulating a research plan.
A soldier's death is never in vain if it makes the formula more plain.
A few dozen make a better case for refining that third decimal place.
They call me Zombie because I don't sleep, as I slowly struggle to climb this heap,
of corpses, data points, and trials, but from the top - I'll see for miles!