It could be that Ford has
It could be that Ford has chosen the Mach-E moniker to be the model lineup that denotes it's electrified performance cars. In a similar way that Audi has their E-Tron lineup. So it might me that the introductory Mach E is their Mustang influenced BEV crossover, with Mustang styling influences. And the Mustang Mach E is the performance hybrid that you mentioned. From the looks of the patent design they could potentially have 4, 6, and 8 cylinder versions with AWD and regular hybrid and PHEV variants. From my view Ford cannot release these EV models too soon.