The round face on the rectangular watch does leave more room for complications in the corners or along the bottom, but quite often a single complication is enough (and X-Large face has no complication). It is curious that they don't yet offer a rectangular face that has a single complication like the Hermes face. Such an elegant face would surely be popular. Was the omission of such a face on other AW models in order to reserve a distinctive look for the AW-Hermes? Seems like they could just change the number font and remove the branding from the existing Hermes face without damaging the preciousness of the Hermes model. Hopefully they will add one to Watch OS3 before it is officially released.
Of course if they would allow third party watch faces then we could have many rectangular face options to choose from.
Sean