I like it. Like others have pointed out it resembles the orginal design of them. I doubt it has anything to do lore related, same goes for the power armor. Some of the couple of things I was suprised Bethesda decided to do, but I'm glad they did, and I sure Obsidean is well if they get to make another Fallout again.

I'll be ditching the jumpsuit as soon as i can. It looks painted onto his skin to me.

It's presumably a throw-back to the original Vault Jumpsuits in Fallout 1/2, which is a shame in my opinion because I preferred the Fallout 3 one's in that they actual look practical to wear and not spandex onesie from some space B-movie. The one thing I'll giev Bethesda props for is their aesthetic design in Fallout 3. Pity about the jumpsuit going back to how they were, least the new Vertibird design looks great.

When 3 came out I hated the look of the new vault suits....but now seeing us go BACK to the ones of the first callouts in a 3d engine the suits just look...awful. Sarah would be so upset about this development

Why would you wear a vault jumpsuit after leaving the vault? It sticks out like a sore thumb. It screams I'm not from the surface. First chance I get I put something else on.