Thanks for feedback.

Currently Table Editor use keys for do something. Table Editor use command palette is only for set properties. I understand it is hard to remember a lot of keys. But if you forget keys you can click Preferences > Package Settings > Table Editor -> Key bindings - Default or Preferences > Package Settings > Table Editor -> README.

If you like to see 'Convert to CSV' in the command palette you have to create file Default.sublime-commands in your Packages User directory(to navigate click Preferences > Browse Packages and select User). There is a content of
Default.sublime-commands

[
    { "caption": "Table Editor: Convert to CSV", 
      "command": "table_editor_csv_to_table"}
]

When you save the file, command 'Table Editor: Convert to CSV' will immediate available on command palette.

Thanks!

Thanks for the detailed response. And for your efforts on the plugin.