That's my issue with it that I've already 100% the game myself a long time ago and every time I've gone back, I've just either been lost as to what to do, or already done with the content they added and then looked at all that had been added and just couldn't be bothered. I wish there was some way to get a reward or whatever for completing objectives, but in the case of this game, I've got a life and missed a lot of the rewards due to running out of time.

For example, maybe they could rework their expedition thing to limited time to start saves, but after you started a save under that expedition you would have unlimited or extended time to finish it.

As far as adding more achievements, I have zero issue with them adding more as long as the content they add them to has no monetary cost. Like with so many other games adding DLC after the fact and adding those achievements then. Especially since the achievements on all the platforms don't seperate the achievements by the content that it belongs to. Like Forza or Fallout where each DLC adds achievements but I have to go and research what is actually base game versus what's DLC or other random bullshit that was added.