I don't want to see the Mustang become less unique, sharing its design cues with other Fords. It would dilute the Mustang brand. The Mustang should always stand apart from any sort of fleetwide corporate grille.
As for the "Mach E" name, it's too similar to "Mach 1". It would be a good name for an electric-powered version of the Mustang, but it's too closely associated with the Mustang to put on anything that isn't a Mustang. And this thing, from what we've seen so far, is NO Mustang.
This crossover deserves its own look, and its own name.
1995 Mustang GT (5.0), daily driver
1995 GMC C2500 (5.7), alternate daily driver