Not really, unless you're in a panic brake situation(where I want friction brakes anyway) Tesla only brakes to 60kW which is more than plenty for normal driving.
You also want friction braking for cases where you've got 100% charge or the battery is cold and you can't dump energy into the pack.
But you need a powerful motor to act as the brake (you want to avoid friction braking as much as possible). And that needs to be in the front.