In vanilla, I don't think it lets you set replacement for nested subordinates. For example, Nested Destroyer B is a subordinate but I can't place a replacement order for Destroyer B's fighters

It simple solves an issue, when if ship in some order, the replacement is not started, despite it enabled.
But set the replacement for ships you have on your own

Does this allow for the replacement of subordinate subordinates?
For example, Destroyer A has subordinate destroyer B. Destroyer B has a fighter group.

Will this allow me to replenish Destroyer B's fighter group?

If you have no issue with it - then not use it.
At least I can't see the significant changes in related part of code ...
But testing is simple - set appropriate order for your ships fleet, enable replacement, and then destroy one subordinate ...

Is this still needed, as in not fixed by the devs?

Another LSR improvement is coming. I hope - today ...

And in parallel
@gorgofdoom and @Strategist Bu Shia
I made a fix to show the hidden crew on Replacement ships

https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3442684328

There are only +4 positive votes leaves to make ratings show ...

Just curious what is wrong with mod, why somebody don't "like" it?

Just something to mention, not sure if its relevant, but ships only need to be filled with 50% crew members for their max bonus.

"Dummy crew" sounds like they don't have a job. It is possible for crew to be aboard a ship that do not have a job-- only ways i know this is caused in the course of play is by picking up escape pods or by capturing a ship which either already has prisoners, or by beating a yaki boarding party to the ship. (the boarders wind up as prisoners, who are essentially jobless crew)

Ok, will dig in

Basically,
I've noticed that when the Lost Ships Replacement is enable, the M and L ships it produces don't have any crew beyond the pilot. To make matters worse you're unable to add crew to the ship because the game for whatever reason thinks the's already crew on it despite there clearly being more than enough room. Growing tired of this I took a look into my and found that the reason for this is there is a butch of dummy crew filling up the crew slots.

Unfortunately - no.
Can you share more information about?

Does this by chance also fix the ghost crew issue with Lost Ships Replacement

It's independent from a ships... It's slightly changed some order aiscripts ...
Only trying to use will answer.
But the diff is applied is small, and has high probability to be applied

Wonder if this would work with ship mods?

There is new one :-)

The AI thumbnail is cool and neat

I'm open for the proposal for thumbnail

ai thumbnail sucks even for ai

Yeh, I found this issue when did the adoption my Protect Sector order.
And yes - it was strange for me too.

Bruh, they make an awesome most needed feature and it doesn't work by default on the very usecases you would need it? (hands off fleet that you forget about)