For the issue with reaction fire, remember, you can hit the delete key to remove someones TU's to prevent a reaction shot. Generally civilian involved maps are a bit less dangerous than others, so simply staying in cover till the next turn is viable, as any map with civilians generally has only pistol armed opposition, mixed in with a couple small arms and melee weapons. Later, once you get armor, except for a few heavy pistols / shotguns shooting slugs, you can literally just run up tanking gunfire from small arms, and be perfectly fine. Just watch out for magnums, shotguns (pellets are fine, slugs are dangerous), or rifles
And, as said before, don't feel bad about killing a few tough guys who hold guns, especially bigger ones. a 10 point deduction from killing civilians is better than 30 or so for a hand, not to mention losing a hand is a much longer lasting effect than a monthly rank deduction. As long as your above -200 or so, you should be fine.
By the way solar, I'm PRETTY sure you are incorrect : I've played on both extreme cold artic maps, and extreme heat pink deserts, and have actively seen this effect enemies. I briefly stayed in a pink desert (BAD MISTAKE EARLY GAME!!!!) and during the enemy turn, half of the troops on the UFO simply collapsed from heat stroke.
I've also seen people in super cold climates struggle to move around, so I'm pretty sure this isn't the case.
The only real exception to this is in the cases of wildlife, or ghouls, which are pretty much immune to intense heat, cold, acid, or smoke, respectively. But normal people (civilians, low level church / guild / academy) are vulnerable to it.
...speaking of weather, I gotta say, cold maps are shockingly hard to deal with compared to heat. Heat can be warded of with a canteen per person, or even an oxygen tank to keep people awake, but cold?... Cold takes a pretty nasty combination of booze and stimulants, and juggling that makes it pretty hard to fight.
Is there any possibility of getting insulated versions of armors, lined with rags? Something like a slight deduction in TU's, for a higher cold resistance? Because as is, short of pink deserts which make you pass out in 2 turns, I'd much rather deal with a hot map than cold any day, and in reality, its much easier to stay warm, than to cool off...and theres already means to have multiple versions or armor, so I don't see why, how a few years in, I still have nothing to keep warm, besides booze or the explorers outfit (which has NO armor at all). I at very least figure heavier armors (warrior, tac armor, ect) would be effective at keeping you warm, but they don't
Come to think of it, an armor plated explorers outfit would be extremely nice, having armor on the front, sides, but a completely open back, at the expense of a pretty hefty bulk.
EDIT : sorry if anything I said here is irrelivant with the new update
EDIT2: Why the move to make mansion missions timed? I had trouble with them enough as is, and the idea of being limited to time makes me want to never try the mission again...I guess I should try it before I whine about it, but these missions always seemed harder as is, even without the time limit, and I was never really able to get as much loot as I hoped, nor even think about clearing the entire mansion.
If your going to keep this change, can you perhaps at least include the entire map being highlighted, perhaps with justification of the girls finding the mansion floor plan, perhaps with a few areas not included just to mix it up?