Hello !
If we type “pxctl volume” we have the output :
Error: subcommand required
We have to append “–help” to discover the subcommands
If we type “pxctl volume create” we have the ouptut :
Error: create command requires at least one argument
Usage:
pxctl volume create [flags]
Aliases:
create, c
Examples:
pxctl volume create [flags] volume-name
Why don’t always append the output of “–help” in case of error in the command ?
(Maybe not the craziest “enhancement” you expected 
)