I think the point is that it also looked stupid in ME2 and ME3 - or so the argument goes - with the ME:A picture just being an illustration that once you've set this level of armour as your aesthetic base you shouldn't have nipple straps.
Verisimilitude is important. IRL soldiers don't run around in nipple strap overalls, and if you start with that aesthetic, you need to keep it up. I'm actually indiffernet to games changing their artstyle between sequels because I don't think games need to look identical, but you need some form of visual identity and you need to be consistent it in it.
Broadly agree with this. Hand-wave it with ''but muh biotic barriers'' all day long, I think someone going into battle practically topless looks completely silly when there are perfectly viable alternatives. It's a big reason why I practially never used Jack.
That said I don't think everyone should rock the full body armor, N7 look. Some squadmates can have more visually diverse armor. Zaeed's is an example, it looks distinct and shows off his tatooed arm, but is still armor. Javik had an ornate outfit, but it was still armor.
But I don't want this to be like ME2 and ME3. If we go in a vacuum, everyone should sport complete coverage, head to toe, with breather helmets. No exceptions. Yes, Mass Effect is a space opera with impossible stuff like Biotics and FTL, but the lore never states that you can just walk into vacuum in your undies and be fine.