It's certainly possible to implement ELB as a proxy. We'd be open to a pull request for that. However our focus on private cloud means we must use Nodes/Insta

It's certainly possible to implement ELB as a proxy. We'd be open to a pull request for that. However our focus on private cloud means we must use Nodes/Instances/VMs for every component. This is how we decouple the PaaS from the underlying cloud provider.