As a motorcycle rider, ...
Quarian on a motorcycle.

I don't get it either, and every time I see In Space Everyone Can See Your Face in movies or games I feel as though I'm being insulted. It's nice that ME3 gave us the option to keep helmets on in convos, I just wish it had actually worked at all times (looking at you Mars). It's not like the characters' bricklike expressions in these games ever conveyed anything that couldn't be done through vocal work or other body language. I didn't find quarians or even volus to be particularly less expressive than anyone else despite the lack of facial expression, for instance.
The job of films/TV/games are not generally to indulge in 100% realism and personally I'm glad. Their job is to entertain and seeing the characters facial animation is something that creators and many viewers/players value.
I think ability to express of volus/quarians are somewhat diminished.
Now I hope mea provides options for those who want ultra helmet realism as long as those who want to see faces/expressions are provided for too.
A good actor can work around a limitation like a helmet or mask. Look at Hugo Weaving in V for Vendetta, for example.
The problem is that Hollywood, and by some extent all western media, can't do subtle anymore. They need to show a character's face in a close up, for several seconds, often more than once... just to get a single emotion across. They treat the audience as if they were idiots unable to grasp that ... for example Finn in TFA is shocked, confused and scared after witnessing the massacre and the death of a friend. They needed three close ups to show that, as if the body language while he was still wearing his helmet wasn't enough. That's acting for children, making only grand gestures and pointing them out, so they can't miss it.
We see cool stuff like the Ironman armor in movies and want that, too. Problem is... have you seen how intricate that thing is under the armor plating? How thin the armor actually is? And how he needs AI support to wear it and use it? I'm not even going to mention the lack of fuel despite the rocket boost effect when flying or that he is in a tightly sealed can without any air.
In my last playthrough of the ME trilogy I tried to keep my helmets on as much as possible. Same for my team. The only reason I got the DLC outfits was for Garrus to wear something without a bullet hole (why would BioWare let him run around with a broken armor and bloody bandages?!) and for Jack to wear something on top. Don't get me wrong, I admire the female form and have absolutely no problems with boobies on display (nor do I think bare breasts have to be a sexual thing) but not in combat please. On board, sure.
The ME1 suits were the most realistic but even they didn't actually have air tanks, which you need in space. It really doesn't matter what kind of helmet you use, without air it's pretty much pointless. Btw... a breather mask wouldn't work unless you literally glued it to your skin.
I think my beef with ME is that it claims to be science fiction, to be serious about science (just look at the codex) but totally isn't. If the game would take itself less seriously, if it admitted it does't make sense but looks cool... then I'd have no complaints. Yes, collapsible weapons are nonsense, too. Not that the technology made any sense to begin with.
I prefer things to make sense. You can't tell me during the mission briefing that a planet has a toxic, acidic atmosphere and then drop topless chick and sleeveless merc on the planet.
So what's the problem with clear faceplates for proper helmets? It's the best of two worlds. Adequate protection and you're able to see the face. Oh no, you have to lug that thing around? Poor baby. Just assume it's strapped to the back of the belt when they take it off, it worked just fine for me in three games.