Why can't I create a Droplet from a snapshot?

You cannot create Droplets in certain datacenters due to limited capacity. If your snapshot is in a limited capacity datacenter, you can’t create a Droplet from that snapshot.

If you have a snapshot in a datacenter where Droplet creation is not available, transfer the snapshot to another datacenter. You can then create a new Droplet from that snapshot in the new datacenter.

You can see where Droplets are available on the Droplet availability page.

You cannot downsize a Droplet from a snapshot. Data is not always stored sequentially in memory, so reducing the size of a disk can result in data loss or corruption.
No, but you can use reserved IPs to assign the same address to new or redeployed Droplets.
There may be an issue with the autoscale pool or Droplet configuration, the VPC network’s size, or resource limits on the team or datacenter.