I see some core team on this thread, so just wanted to say THANK YOU! Awesome job! Keep fighting for the users!
I'm totally the wrong person to offer recommendations on mobile, but so far it works very well for me, but then, I use almost no third party apps, and none of them are Play store only. My only complaint is the hardware (outside of their control).
I wish that were true, but if you delete the 100s of binary blobs (many with effectively root access) copied from a stock donor vendor partition the phone won't function at all.
There is no such thing as a fully open source and user controlled Android device today.
The Precursor is the only pocket computer platform that is maximally open hardware, software, and firmware but you revert back to the 90s in terms of power as a consequence with alpha quality software today. If Bunnie is successful with his IRIS approach and making custom home-user-inspectable ASICS then maybe a middle ground path can be forged in the next few years.
For now the only modern computing experience with fully open hardware and software I am aware of are the ppc64le based devices by Raptor Engineering, but at a very high cost due to low demand, with huge form factor and no power management. I still own one anyway because we have to start somewhere.
For those that want this story to get better, please buy and promote the products of the few people trying to break us out of dependence on proprietary platforms.