Current feedback and voltage feedback at the same time?
What you describe is something like power feedback where the power is feedback to control the power input, but this type of power amplification typically isn't done in conventional electronics.
The main problem is most commercial amplifiers can be configured to either measure voltage or measure current but not both at the same time.
The way to get around this would be to use an amplifier that measures current, and an amplifier that measures voltage and then use a multiplier to calculate what the power is, then use that value in negative feed back. I wanted to make one in this question: Constant controlled power source
The problem is power measurements are also inherently noisy as the noise from the voltage and current is multiplied.
It's much easier to stick to only one measurement.