Sacrosanct
Legend
Perhaps what we should do is be more specific. Because, in general, I agree that people lump "anything to do with crawling/surviving a dungeon" in the same category as "anything to do with traversing/surviving the wilderness," and that might be part of the problem. As long as the "survive the world-environment" type stuff is merely a subset of another category, rather than a completely developed category in its own right, it's probably going to get a short shrift.
In the spirit of that, I propose separating delving, which has to do with traps, locks, secret doors, "dungeoneering," and all manner of "survive this hellhole fortress" things, from expedition, which has to do with creating shelter, finding sustenance, logistics, establishing a safe perimeter, and all manner of "make sure the environment doesn't kill you" things.
There are a lot of classes that get "delving" support. Apart from the Ranger and Barbarian (and maybe Rogue), I'm not sure there are classes that get much inherent "expedition" support--though being a full caster goes a long way, because spells can do nearly everything. To the best of my knowledge, "delving" can be supported by a variety of skills, while "expedition" is almost completely siloed into Nature and Survival; similarly, I'm not sure there really are that many tool proficiencies or background benefits that are much use for "expedition," but I could be wrong. I, personally, would like to see all classes have discrete, declarative, non-generic abilities for each pillar, that don't compete for resources with other pillars. I'd like to see items, like the hand axe, which trade a small amount of offense potential for a nice suite of other benefits, such that they'll be a nice balance-point, saving weight while working multiple jobs.
I'd support some sort of unique class features that are explicit rather than implied as they impact non-combat related pillars, if not for anything else, to bring those pillars back into game play. Heck, not even class based, but background based as well.