Injury / Exhaustion / Energy Drain

For barbarian players.

Are you guys ok with how the Injury table currently in the original post interacts with the barbarian class features?

Nope i am not.
Several reasons:
D&D is not designed for an injury system, means not at all. Hp in D&D are totally abstract. If you need detailed injuries play another system.
There are zilch mechanical consequences for having lost so and so many hp.
As a player you still can act out hp loss via rp.
And because there are no mechanical consequences you can interpret 90% hp loss as being little tired or bleeding from several wounds.
The only time when there are mechanical consequences is when you reach zero. And again, you can rp this as you like.

[MENTION=58172]Yaarel[/MENTION] check out the dark eye rp system. It has an injury system, with mechanical consequences after loosing so and so much health. But it uses also an armor as damage reduction system in contraire to d&d and the newest version is without character levels. It had kind of bound accuracy built in from it beginnings.
So if you intend to introduce an injury system kind of similar to that by using the exhaustion table then do not forget everything affecting players should also apply to the mobs.