The problem with GOS creating a one-button pack installer is that they would be endorsing whatever they include in that.
They are very, very careful about what they endorse, and I think it is for good reason.
That abundance of caution protect their reputation.
Beyond that, vetting a bunch of apps that aren't strictly necessary in order to utilize the hardware is a LOT of work that is beyond the scope of a project that is for the most part focused just on hardening AOSP.
Honestly, the fact that GOS even ships with a calculator, a PDF viewer, and an image gallery is already a luxury, when you think about it from that point of view.
Accrescent is sounding like it is likely going to be the closest thing to a one-stop shop for trustworthy apps. It is its own project, with its own team, and the whole point is to be a repository for thoroughly vetted apps.
Frankly, the fact that GOS is putting the Accrescent app in GOS's apps repository is pretty surprising. That's a looot of trust they are putting in Accrescent - they are essentially saying "while recommending apps is for the most part outside the scope of the GOS project, we trust Accrescent to do it well enough that what they give you won't compromise the work we do on the OS."
GOS is entrusting their reputation to Accrescent.
Think about what it's like recommending someone to be hired by the company you work for. If they turn out bad, that impugns YOU, too.
These things take time. This applies to both GOS and Accrescent. Both are works in progress. Simply due to the fact that GOS is forked from / built upon(?) AOSP and is focused on hardening over pretty much everything else... GOS will lag behind AOSP by a tiny bit and lag behind Stock OSes by a lot in terms of feature richness, user-friendliness, and aesthetics. These things ARE taken into account, they just aren't the top priority.
This is the price for being at the forefront of free and open-source mobile device OS security.
Same goes for Accrescent... It is brand spanking new, ambitious, and is essentially herding cats because it's gotta make sure all the apps on it are worthy, and that means reading and checking the work of an ever-increasing list of developers.
That's like trying to regulate the sanitation and safety of a bunch of restaurants, each of which serve completely different kinds of foods, all with only a few people.
Holy cow, y'know?
So yeah, I get that this lack of features out of the box (so to speak) and the "easy to use for anyone age 5 to 75" and the extreme convenience provided by highly integrated ecosystems like Apple's is frustrating and is definitely a barrier to entry.
Trust me, I used iOS for like... A decade. Look at my post history, switching from iOS straight to GOS was an ordeal.
I know it's a pain in the butt.
But these inconveniences are a necessary consequence of what GOS has to do to be what it is.