Woot! my option went in
That's not exactly as straightforward, as there are beings that do have recoverable corpses, but shouldn't be killed; for example a hybrid, who is pretty much a normal guy except for some details which should be studied in the lab from a corpse.
We're discussing it with Meridian on the chat and something probably will happen with it at some point. 
So it was changed as previously discussed, I guess.. Which I still find weird.
It makes sense in the hybrid case (you might run an autopsy and do more research on a dead hybrid you find, but not kill one during interrogation just to get a corpse to do more research on), but I find it odd in Piratez and counter-intuitive for aliens.
In Piratez, not at least robbing them of their valuables (the old booty) seems unlikely, given that we kill, enslave or rob people generally. Maybe, knowledge as a ransom it acceptable, it still impresses me that the gals don't at least grab some of their loot/armor. I mean, you give a Marsec Bodyguard his power armor back after spending days interrogating him so he can walk away?
And with aliens, what does that represent? You let the alien get away after they tell you about stuff? XCom wouldn't do that.. Or the alien gets chopped to bits useless for autopsy during the interrogation? I guess one can make live alien interrogations automatically unlock the autopsy topic, to represent the deadly interrogation and following autopsy.
