There is already a work in progress patch (able to run Haiku and BeOS apps) on Gerrit. Surely one of the things we can revisit and finalize.
It depends what you need. For example my work PC is in the office which is already quite safe from people wanting to steal data, so encryption is not really needed. However, when I take a break or attend a meeting, I better lock my session somehow, otherwise people seeing my computer left open will send an email on my behalf kindly offering to bring breakfast for the whole company the next day 
That being said, the existing screensaver lock, while quite limited, could be enough in this case.