Additionally, the implementation of needing to destroy 6 Onslaughts (plus their brand new officers) to remove a single hull mod is laughably disproportionate, especially since it's still random so it's 6 onslaughts to remove a single d-mod from a single frigate.
That's a disingenuous interpretation of the effect. It's just 240 dp total, it doesn't matter what that DP actually comes from. Could be freighters (so yeah, you should autoresolve those fleeing civ ships), could be like 6 tiny pirate frigate fleets in a row. Could be a full remnant ordo that actually has like 400 dp so there's a pretty good chance you actually get 2 dmods removed out of it or could be a system's worth of derelict defense fleets.
Again, this sounds like piracy not starfaring. Piracy should be with the piracy tree, not half wedged into starfaring.
Since when do pirates spend their spare time hunting remnants and derelicts?
As for wasting it on frigates, spend 10-40k on repairing them first? It can't repair your frigates if they don't have dmods.
Because the point of starfaring is to give your fleet more endurance being far from home IE: No shipyards. Restoring them back at home base runs counter to the point of the tree.
You do have to go back home at some point and run maintenance and resupply.
I think you'll find many of the skills are a bit nerfed here but that is made up by being able to have 3 XOs. Even if you spend a slot on piracy or starfaring (you don't have to use a logistics officer btw), I'm certain it's still an increase in player power.
Most notable fleets I've encountered have had two combat-specialized XOs each with capped level. Assuming you are devoting one slot to your logistics you're only breaking even at best, but the NPC fleets don't take any experience to have high level XOs yours however require a major amount.
Unless they are specifically assigned, there is a good chance their XOs are poorly optimized while the player can build around their XOs. Also it sounds like you might be playing on hard mode if they have such high level XOs in which case you don't really have room to complain about such a thing, you asked for it.
Will comment that the "killing X DP of ships" effect also feels like it should be in the Piracy XO tree rather than starfaring (since starfaring is in every other case about maintaining your stuff and finding new stuff, not fighting other fleets).
To me, starfaring is the "I'm gonna explore the sector and survey and loot literally every planet I come across" tree. While you're out doing that kind of stuff, you'll definitely find some opportunities to fight stuff still. Plus I don't think pirates are really concerned with restoring their stuff, they'd probably sell the scraps they'd use to do that instead hence the credit capstone. Additionally, while there is a theme for the each skill tree, they are not intended to only be used within that theme. There's even a loading tip added that says exactly that.
I feel like this isn't really accurately answered and you're contradicting your own point from earlier by saying "just restore forehead" when you're in deep space far from home.
There isn't any contradiction. You can explore and still go home to restore occasionally if you find your frigates somehow have several dmods despite having a pretty good chance of not getting dmod in the first place.