I agree. Rancher has too many balls in the air. They are trying to support Cattle, Swarm, Mesos, Kubernetes... As a result they aren't terribly good at anythin

I agree. Rancher has too many balls in the air. They are trying to support Cattle, Swarm, Mesos, Kubernetes... As a result they aren't terribly good at anything (The UI is insanely slow). Other specialized tools that just focus on one orchestration framework could zoom past Rancher. Look at the Kubernetes UI in 1.4.