frednz:
... how about the battery of the BMW i3, would you consider this is "repair friendly" and an improvement on the Nissan Leaf situation?...
No. You have the same concept - you need to lift that car to get the heavy battery out. In comparison - Prius traction battery can be changed on the beach without lifting the car - one man job.
Size and weight of EV traction batteries would also require quite a spacious storage and workshop to deal with.
I am already anticipating owner's expectations that someone would be willing to swap "one failed cell" and she'll be fine... for a few bucks. Not going to happen.