Some features we really want to see are when upgrading a droplet, the ability for the disk to increase in size. Right now, you have to image it, delete it, create a new droplet from the image, and pray that you keep the same IP address. Not a suitable solution for companies relying on uptime and stability.
Second, when creating a droplet, the ability to check a box, "ensure this droplet is provisioned on a different hypervisor then the rest of your droplets." Again, when building a highly available cluster, does absolutely no good if they are all on the same physical machine.
Finally, the ability to attach multiple ip addresses to a single droplet is a must have.
With that said, thanks DO, you guys rock!