Crikey, hand bags at dawn...
I'm not really an experienced ebiker, built my donor 1yr ago has a 1500W rear hub 52V 17.5Ah branded battery.
I can ride it without the drive train although I prefer to have chain on so bike feels natural and I can get some exercises and use PAS / throttle whenever I see fit, I leave it middle gear
My ebike will go up hill such as this as 15mph and not even blink, the thought of having to mess with gears to do this fills me with dread...
For me I would never consider getting a mid drive, why fanny about with gears for minimal power savings when you bought the bike to have fun....?