ISTM that GOS is primarily devoted to "hardening" AOSP, which is/was otherwise not as secure as it "should" be - in the eyes of Daniel Micay (origonator, lead guru and working geek). Wisely, he was not interested in developing applications or increasing function per se; he wanted a platform that could use EXISTING Android APPS in a safer way - primarily security, with privacy an additional goal.
Somewhere along the line GOS had to develop their own PDF reader and heavily customized browser - tools that are very central to smartphone use; and I'd guess the off-the-shelf alternatives were simply too vulnerable to allow. GOS also developed SCOPES - don't know the rationale.
Given AOSP is evolving rapidly, I imagine it's a FULL-TIME job just keeping up with AOSP and new hardware.
(However, there are lower-priority "enhancements" that the devs are working on, and it might(?) be useful if they got feedback from users on which of those the users would appreciate.
E.G. My candidates for prioritizing ongoing enhancements would be IPC Scopes, and anonymized Vanadium.)
But the priority has to be maintaining the quality hardening of evolving AOSP on evolving Pixel hardware; and they seem to be doing a good job with limited resources.
Enhancements? Dev's call.