A sweet bonus would be if they also provided and fully supported de-googled image or at least had an option to download the de-googled image after accepting some disclaimers. Or perhaps even set up a public community for phone hackers to help them build said image i.e. crowdsource the work.
An optional large shell for a bigger battery would be a nice upgrade too. My current phone has a 10,000mAh battery and lasts a very long time after disabling background networking on most apps.