This DLC is out and the basic route i've come up with so far is:

Start game as normal, intro and all that jazz (10 END, 4 CHR, 10 AGI) (Go into Change Appearance to get a pipboy)

When leaving vault start heading east towards robot disposal grounds (pick up fat man, mini nuke, fusion core)

Continue East, pick up a Day Tripper in the shack NW of Outpost Zimonja.

Continue East to Nakano Residence. It's in the far northeast corner of the map.

Run into the boathouse and get the tape in the safe (play it. key is in picture frame nearby)

Get the PA from nearby the disposal grounds and speak to Mr. Nakamo to begin the DLC quest.

Go to Far Harbor. When you gain control dump PA in middle of the town and run to Acadia. (Level up Action Boy and do some binds)

Speak to DiMA. (Or find 2 good clips to get to nakami early) (Level up 1 CHR/Solar Powered dunno yet)

Speak to Nakami then DiMA again (Pop Day Tripper and hope you get the check)

Exit Acadia and run towards Nucleus. Make a save outside the cave halfway there.

Run to the Nucleus and then to the Vim factory.

Fast Travel back to Far Harbor and grab PA.

Go to Nucleus and go into the back. You can PA clip into the wall and COC into the shortcut above.

Make your way to the terminal to start the exciting puzzle minigame. (2 Assaultrons will spawn in here, you will NOT survive without PA. The Fat Man would be used here I guess)

When you finish the first memory game, exit simulation and loadwarp into cave.

FT to Vim factory and get to the bottom to fetch Averys stuff. (Dunno if PA is worth bringing. PA can skip a Novice hacking terminal but it's slow to run with PA, though you can clip out to save backtracking) (Loadwarp would save time here too)

Exit Vim and FT to Far Harbor.

Speak with Allen Lee and show him evidence, then show Teddy the skull etc.

Tell Allen Lee to attack Acadia.

When attacking Acadia you need to get Nakami killed to trigger the final quest (Close to Home)

when quest triggers run away and FT to Commonwealth.

Speak with Mr. Nakomo to finish quest.

Route is rough and obviously not finalized, but this is a start I guess.

Other Notes:

Killing Nakami early would cut it down even more, but she is set to Essential in earlier quest states as far as I know.

Video of route/a speedrun if anyone wants to do runs. Sorry for poor bitrate.