To me, it would suffice to have them stop running towards the alien when they have to choose between the critters and my soldiers...
It is at least frustrating, seeing them walking happilty to their death when you're trying your best to save them, and they can see you clearly !!!
They should, I guess, recognize the soldiers and run towards them, and at least run AWAY from manifested aliens.
The above suggestion is cool, though, and I like it...