Allow servers from different regions/data centers during scale up
During scaling up, you allow us to pick the size and how many, but it would be nice if we could pick the region/AZ/data center to put the server in. For example, I'd like to have application servers in the IAD and DFW Rackspace datacenters within the same stack. One might argue this doesn't matter if my IAD load balancer fails, but I could change DNS from the IAD load balancer to the DFW application server. It's easier and cheaper than having a failover group on standby.