Lets all beg Blizzard for something to actually do with these! And..I have an idea! A pet, purchasable with 9999 polished battle-stones, I've even designed the pet! I posted this on blizzard forums too, hopefully they might be interested or at least come up with something else to do with them ;p
Polished Stone Amalgamation
Formed from the crushing pressure of huge mounds of forgotten Polished Battle-Stones, this elemental rages at it's neglect from society and vows revenge on all pets!
1 Stone Rush -slams into the enemy, dealing x damage to them and x damage to thenselves
2 Stockpile - throws excess battle-stones into a heap behind which he hides, blocking 2 attacks
3 Upgrade! -absorb the powers contained in the condensed battle-stones, increasing damage by 25% for 5 rounds, 9 round cd
4 Hurl - throws a battle-stone at the enemy, dealing x damage to them and reducing their speed by 25% as they pick it up and check if it's for their pet family
5 Stone Storrrmmmm! - whirls violently, throwing off loose battle-stones in every direction, dealing x damage to all enemy pets, 3 round cd
6 Downgrade! -Decreases the enemies stats to Uncommon quality for 5 rounds, 9 round cd.