Most footballers find their key supporters and friends outside their dressing rooms—for obvious reasons too. Wouldn't worry too much about the likes of Havertz feeling like an outcast.
As an option in our squad it's exactly Havertz's "square peg" quality, where he doesn't quite fit the Arteta template for the 8 position, that seems likely to help us. It makes him a true option in our squad, whose selection or introduction will change us tactically: how we build play, drop balls into the box, handle dead balls, where we look for cut backs and late runs, etc.
Overall it seems a bit like what I hoped for with Vlahovic, with many many differences of course, but it's that Plan B quality, adding onto what Trossard has already brought us and making us harder still to nullify for ninety minutes.