APG Barbarian Variants and Rage Powers

[Is Errant]

RAW - Improved Damage Reduction cannot be taken until level 8 (Core).

However, is that because the Barbarian does not attain any Damage Reduction until level 7, and therefore level 8 is the first opportunity to increase it?

Curious, because of the Invulnerable Rager variant for Barbarian, which drops Uncanny Dodge, Imp. Uncanny Dodge, and Trap Sense in exchange for earlier Damage Reduction and Endure Elements, and I'm wondering if it'd be breaking to allow the Improved Damage Reduction rage power for a sub-level 8 Barbarian.

RAW would say no, but since APG came out after, wondering what intent would/could be.

Thanks all.

[northbrb]

I am very curious on this as well. I would love to know what the Dev's would say about it.

RAW would say no but RAI might say maybe.

[Mojorat]

the level requirement for rage powers does not change.