Once installed, it is interwoven into the story in some capacity
The HK factory and the droid planet are two separate modules. The HK factory is restored with TSLRCM, whereas M4-78 is optional content that makes a few minor changes to the story in terms of pacing
M4-78 is restored by a separate team and had to recreate dialog and such. It is also overly long and tedious.
It's a fair claim that you can skip it as thing featured in it were either scrapped for good reason, or relocated to different parts of the game
So this playthrough I'm boned and have to complete? And I can't just uninstall and have it the save work because it is interwoven, ugh
Edit: also, why does hk 47 not help me fight the hk 50s?
You'll just have to power through it. Luckily once the first part of the level is done, you gain access to fast travel points in the level
I'm confused. Is the crappy planet optional or not if you have the restored content mod?