Isnt this for there rides at the parks?

There is a turtle mode that lowers the acceleration.

You could just take the pack out and replace the cells that are degraded the most for a lot cheaper than replacing the whole pack.

Apparently headlights are expensive http://jalopnik.com/headlights-are-too-damn-expensive-but-i-have-a-solution-1794231519

They can replace individual cells within the battery so it shouldn’t be too expensive.

The battery is seal to a point where there is little chance of electrocution. Musk even tweeted that the car could ,if needed,float and drive around a bit using the rotation of the wheels.