Hmm, I see the point about the game being about killing aliens, but it's not as if everyones gonna equip every single trooper with grenade launchers and 25mm gas grenades. Even so, I'm sure it wouldn't be too hard to lower the AoE and stun damage of the 25mm gas grenade compared to the regular thrown gas grenade or the 25mm plasma grenade.
Oh well, I guess I was thinking about it from the soldiers' point of view:
"Okay, soldier we need prisoners. Take a stun rod from the armory before you deploy."
"Uh, you want me to walk up to heavily armed aliens and hope they don't blast me to bits before I poke them with a shock stick? Sir?"
"That's right soldier. But if that's the way you feel, feel free to take a few of those new gas grenades with you."
"Sir, I believe the research team managed to develop a 25mm version of the plasma grenades. Couldn't they do the same thing with the gas grenades?"
"That's an interesting suggestion soldier, but that would make things too easy. Take all the fun out of bagging those green-skins, eh? Now get a shocker and get me an alien, is that clear?!"
"Sir, yes, sir!"
Actually, it's not terribly hard to stun an alien. Shoot it a few times with a low powered weapon (any pistol) then throw 1 or 2 gas grenades. All my troops carry 2-3 grenades, so really don't see how making non-lethal ammo for the grenade launcher would make it "too easy".
I'm not really bothered about it, i just thought it would the grenade launcher a bit more multi-purpose.