I don't like the fact that Tekno places the motor on the chassis and not on the center diff assembly. Also the long shank pinions is not a great idea IMO. too much stress on motor bearings. Traction drive and elctri-clutch, don't get the idea of that either.
You want simple, what's more simple than using you'r existing chassis. It may look like an afterthought, but it works. And the balance is fine.
Never been a fan of mechanical brakes in electric cars either, I like the K.I.S.S. approach.
I got into electric because it's fun, and requires less maintenance. I don't want to check for brake fade and clutch shoe wear.
I'll admit I'm extremely biased. I've never held a Tekno product in my hands.