There are actually a couple of things going on:
- This is a City Builder, and posting a future building (including unboosted manufacturing) is a very elegant way to define a complex goal.
- The quests are (should be) used to shape the user experience, and especially so when neglecting something will bite you later on.
- In the mid-game the quests provide a bit of extra incentive for things that you need to do anyway, like getting more relics.
- The developers are still tuning the Tech Tree, and the quests are occasionally a jump behind the tech tree. The developers don't really have any choice because allowing the quests to lead the Tech Tree changes would be even worse. As well you can imagine, changing horses, mid-quest, can be very tricky.
- There are occasional bugs. A few months ago the expansions were not being properly counted, and when that problem was corrected it locked up several in-progress quests. One of the consequences is that you can now see sequence numbers in the Tech Tree for squad size and expansions.
- The August YouTube promo indicated that we can expect the Tech Tree to be expanded in the near future, and hopefully putting together the related quests will be a good excuse for reviewing what we already have available.
So I think it's mostly a timing thing. This is a City Builder and, as such, we'll have a lot of folks who LIKE to optimize their efforts, so better questing visibility is certainly on my agenda, but the tail can't wag the dog.