We could make our bodies better by unblocking the regenerative capabilities (see salamander) in our cells to be able to grow back limbs.

If you have the ability to grow limbs by unlocking functions in the cells… maybe you can send signals to alter the blue print and grow limbs/organs according to new specs, such as changing efficiency , dimensions, appearance, etc. AND at that point, you’ll have companies that will sell cell coding templates to match your favorite celebrity!