Karabiner-Elements Command+Tab -> Mission Control

cmdtab2missioncontrol.json

{
    "title": "Command + Tab -> Mission Control",
    "rules": [
        {
            "description": "Replace Command + Tab -> Mission Control",
            "manipulators": [
                {
                    "type": "basic",
                    "from": {
                        "key_code": "tab",
                        "modifiers": {
                            "mandatory": [
                                "command"
                            ]
                        }
                    },
                    "to": [
                        {
                            "key_code": "up_arrow",
                            "modifiers": [
                                "control"
                            ]
                        }
                    ]
                }
            ]
        }
    ]
}