What exactly do you mean by "the whole dance"? I've found Android Auto to be pretty simple to use. There's just one short USB cord I plug in right next to my shifter and I'm done. Everything comes up automatically. This is on a VW Golf, so maybe it's simpler than it is for you in the Focus?

Most of the problems I've had have been software bugs. Like this morning when I attempted to send a Hangouts message. The assistant voice made it sound like it worked, but nothing every actually sent.

Anyway, I'm not sure a screenless device is really what you want. Most of the appeal of AA is that it uses your regular phone, so it can use your data, read and send message, make calls, etc.

Disclaimer: Google employee