The captain's journal does not have enough entries. Let me give an example of something that happened last night. I found a system that the Mu'Kay use as a layover for deep space exploration. And on one of the planets, I found a Not So Cuddle Drive. Score! (Yeah, I already have a Not So Cuddle Drive, but this one was free and I will be able to get it for free in my next play-through... I hope.)
Flipping to my journal... I found nothing. No entry.
Events like this should be recorded. If I was a captain, this would be something I'd record. And yes, I want to take the captain's log and use it to build a speed run and a completionist path. I can't do that if my journal isn't recording important events like finding a high-end hyperdrive for free.