As per the documentation, pools are basically just resource groups to make permission management easier, so they aren’t really supposed to handle anything like that. Maybe look into a RAID setup of some sort or mergerfs if you just need file level pooling.
I’m also interested, sure can be tough to find dubs for the fam. Pretty sure we got a few private trackers kicking around but I’m not really familiar with any reliable publicly available source off the top of my head.
I gotta say, upon closer inspection Yunohost looks way more elegant and complete a solution than I was picturing. Figured it’d mostly be premade apps ready to install but there’s also built-in LDAP + email, let’s encrypt certificates, integrated security features, the list goes on and on. If the execution is even remotely as smooth as the documentation suggests, Yunohost sounds great!