Hmm... I can't understand the difference.
Current
There is 1 energy bar.
If player took heavy damage , slow down.
If player lost all energy of leg, it breaks & can't move.
We can repair leg.
New
There are 2 energy bars.
If player lost energy of external, slow down.
If player lost all energy of leg, it breaks & can't move.
We can repair only external.
This is almost same. I can't understand the benefit of New system.