Environmental Warnings, why?

This is something that bugged me too.

But beyond the inconsistencies, it annoyed me that an exploration team would not have suitable gear for exploration.

1: Slightly nitpicky, but there is no temperature in a vacuum. Temperature is how quickly the molecules of an object or fluid are moving, and there can't be one if there are no molecules. While space is technically a very thin, and yes, very cold, gas (about one atom per cubic centimeter), it's so thin that you would still gain heat from the light of a sun faster than you would lose it through convection under most circumstances. So, yes, standing on Voeld at around between -60C and -40C  at 1.42 atm is actually colder than standing in space at around -270 and very close to 0 atm.

2: Ryder's suit can't stand the radiation of space. The nomad can, and that's why you have to stay in it on H[bunchofnumbers]. Ryder's suit can, just barely, stand the levels of radiation on Eos, but that would be orders of magnitude weaker than what you're getting on the asteroid (which is space, for purposes of radiation). And admittedly, how the radiation on Eos works can only really be explained by "remnant stuff is weird and does weird things".

3: Imagine how much more annoying it would be if the game gave you no indication and your first warning was when you glanced at your life support bar and noticed there was only about a quarter left.

1.  Ummmmmmm no.  As goishen said, there is indeed temperature in a vacuum.  Even without atoms or molecules, there's electromagnetic radiation, neutrinos, possibly dark matter, and who knows what.

2.  I seem to remember Ryder going for a spacewalk at least once in the combat suit+helmet.  I think it was during Hunting the Archon and you had to go across a vacuum area.

3.  The point being that the cold/heat shouldn't be hurting you in the first place.

I liked the immersion. Just do the vaults first and you wont have to worry about it. Problem Solved.

That architect fight. Where if you jump out the nomad you freeze to death.

So you have to hide in nearby buildings and duck in out of patios to avoid the cold.

While fighting an architect.

So much overkill.

I think it's just a way of restricting your movements until you progress further in the game and improve the environments.

I was using the explorer's biotic blink constantly. I would go through the walls and zip to safety and make pot shots at the architect outside, then zap back to one of those heaters. It was weird and entertaining. 

A Krogan wouldn't complain about a hard fight.

I loved it, it made sense to me and definitively added to immersion. The only thing that bothered me was SAM, in Voeld.

I actually loved that fight.  Was an absolute blast on Insane mode

Maybe it is just me, but if I were preparing for an excursion to another galaxy, I'd remember to pack my shorts and my jacket ... ~shrug~

HOWEVER ... on the comment about the Nomad ... we DID bring it with us.  The Tempest may not have specifically had the thing, but it was brought by us.  We just decided to keep it on the Tempest after borrowing it on the planet we started on.  Just clarifying there, because some of the stuff above made it sound like we stole the Nomad from aliens or something

What's the problem? A talking computer that gives a weather forecast every three seconds? What's not to love? Every home should have one!

Pathfinder, there is light rain.
Pathfinder, it's raining!
It's still raining pathfinder!
Pathfinder, it's raining some more!
Pathfinder, my senses detect that rain continues to fall!
Pathfinder, it's raining!