I disagree that odyssey engineering is inconsequential. Yet, the same as with ships, I believe a new player might be very well to ignore engineering except: except know that you will thank yourself later for all the tasty materials you do build up along the way.
Engineering in EDO is mostly inconsequential. Upgrading isn't. And upgrading is hugely more beneficial than engineering.
In EDH, it's the opposite (but upgrading to an A class ship is so comparatively trivial, there's no reason to not do it). If you play a new commander, try combat without engineering at all. I did this very recently with one of my accounts. As soon as you hit Novice (which you can get even
without firing a single shot in a ship, because combat rank goes up with on foot kills that aren't in a CZ; amazing, huh?) you will get randomised pirates that are competent and higher, all with a fair amount of engineering on them by default. Try one of the massacre missions with the "they know you're coming" twist and, if you get spotted, you'll get attacked by Expert ranked ships (that, just in case you didn't know, will constantly respawn as you kill them). In my A rated, non modified Cobra, I was able to just about take one down after a long... LOOOONG fight and then lost my ship shortly after despite trying to flee. Against the competent pirate that interdicted me, my shields were down before I'd even scratched theirs. I'm no new player to ship combat and have been playing the game since it launched. That's one measly competent pirate, probably worth about 20k credits or so. Imagine trying to actually bounty hunt against them? If you engineer fully, it will become trivial. I mean, I have repeated this many times here but I really don't think I should: everyone who plays EDH as a combat pilot should know that engineering has a
significant impact on the difficulty and ignoring it would dramatically shorten your scope for content (and ignoring engineering altogether also dramatically reduces the fun of the game - and I don't mean that because I love engineering, because I do not, but I say it because a fully engineered ship is way more fun to fly than one with zero engineering)
Engineering in EDH is essential if you wish to play any combat role as an average player; the game ensures this is the case by its extremely steep difficulty curve. Contrasting to that is EDO, where it's only important to upgrade your gear (so, the equivalent to buying an A rated ship, albeit more of a faff to do as it's not
only credits that you need). A fully engineered suit and weapon isn't required at all to defeat the majority of the most difficult scenarios in EDO*. You can compete in a high intensity CZ in just G1 gear (although it's less efficient, you can just avoid damage by playing carefully and it just takes more shots to kill your targets) - this is something I was able to do just fine with my new commander, racking up over 1m credits in kills and maybe only dying 0-1 times per round. Upgrading to G5 will make this much faster but is not essential in any way. Engineering is just nice to have, allowing you to spend more time on target, less time reloading and it gives you a touch more survivability (nothing compared to just upgrading the suit to 5).
A G3 set of gear, bought entirely from shops, will be enough for most players to enjoy all content in EDO and be fairly efficient.
I sort of get your point (we do the content to get the materials to upgrade, so why not enjoy that?) but I actually think the way they've designed that self-fulfilling loop isn't the best way of doing things. I'd have preferred it if they had allowed us to also upgrade our ships via on foot (in much the same way) as well, giving a whole new method of approaching the massively grindy EDH grind loop that doesn't involve scooping up cannisters in an HGE over and over again. But that's besides the point being made...
And that was, there's not really any "best" mods in EDO and you can more or less pick whatever you like and it won't impact your game very much. It's useful to know which mods are somewhat better than others but even a G5 with "dud" mods in it is still better than a G4 with 3 "better" mods. The conversation can perhaps mislead some new players into thinking it's complicated and it's just not.
Contrast that to EDH, where it really can matter a whole deal what mods you get, and the conversation has greater benefit (and is way more complicated).
* This statement doesn't include the horrendous 6-12 scavenger drop ship attacks you get on some of the most basic missions like impact sites, where there's no cover. These are extremely tough to defeat as a new player and I count these as an outlier because I actually think they need to be toned down by a long way. But in this scenario, engineering isn't going to help you much anyway.