Central storage (e.g. Ceph) would allow for improved migrations and failover scenario's.
Hilario Perez commented
I second what @Anon is proposing.
Ventas Libres commented
Much needed feature to allow failover.
This feature is planned to be implemented in SolusVM 2.0
The details are here https://solusvm.com/roadmap/
I opt for copies on request but also that the backups made automatically in the node can be restored in another different slave node
Ability to store templates/isos on a central server would be great too, where people can assign certain nodes to a certain storage server to pull templates etc from.
Storpool.com as a addon would be great for HA solution