I don't like the 2 brakes:1 lever idea at all.
It very important to know which brake is providing the most braking, never more so than if you are braking whilst cornering (on a loose surface).
It's taken Honda decades to get its linked braking system accepted by motorcyclists (and even then some won't go near it). The principle is the same, it's better to use mainly front brake in a straight line but sometimes better to use mostly back brake when cornering, because locking a front wheel on a corner is catastrophic (unless you actualy enjoy the taste of tarmac).