- kubeadm: if an unknown command name is passed to any parent command such as 'kubeadm init phase' return an error. If 'kubeadm init phase' or another command that has subcommands is called without subcommand name, print the available commands and also return an error. ([#127096](https://github.com/kubernetes/kubernetes/pull/127096), [@neolit123](https://github.com/neolit123)) [SIG Cluster Lifecycle]

- Added a `--show-swap` option to `kubectl top` subcommands ([#129458](https://github.com/kubernetes/kubernetes/pull/129458), [@iholder101](https://github.com/iholder101)) [SIG CLI]

- Upgraded the `kubectl autoscale` subcommand to use `autoscaling/v2` rather than `autoscaling/v1` APIs. 
The command now attempts to use the `autoscaling/v2` API first. If the `autoscaling/v2` API is 

- Enabled kubectl to find `kubectl-create-subcommand` plugins when positional
  arguments exists, e.g. `kubectl create subcommand arg`. ([#124123](https://github.com/kubernetes/kubernetes/pull/124123), [@sttts](https://github.com/sttts))