I get wanting light weight, my current aluminum ebike is 80 lbs, but my current ebike is a Juiced Ripcurrent S fat tire with 1kWh battery and I completely out speed and out range my friend who has a Turbo Vado SL while being much more comfortable and spending 1k less. The main downside with the weight is getting up on a bike rack to drive it somewhere, but they have rack with ramps now designed for heavy ebikes.
I know for sure my next bike will have full suspension, coming from mountain bikes then going back to just a hard tail was rough, even when just riding on pavement. Added a really good suspension seat post but still not like a full suspension.
I am looking closely at Watt Wagons new Hydra carbon full suspension at 58lbs. They are doing some good stuff with the Bafang mid drive and upgraded controller.
https://www.juicedbikes.com/products/ripcurrent-s
https://wattwagons.com/collections/hydra