control4 is really meant to bring everything together in one uniform app, control devices with a simple remote or touchscreen. if voice control of everything is your main concern you should go with joshai. other than that the dealer should have explained josh is your choice of voice control for everything if you dont want it to be clunky. Another solution could have been control4 to unifi everything and focus on tv viewing, cctv viewing, garage doors etc. then use sonos with alexa built in to voice control music.
my focus would have been control4 for video zones, thermostats, garage doors, cctv viewing, lighting, music and then alexa could do sonos music easily, lighting easily, thermostats, and more
design is key