Speaking of Steam Tanks, I wonder if the new book will either weaken Steam Tanks or change the fluff to account for the fact that every army fields them right now even though there are supposedly only 8 in the whole Old World. Maybe the engineers finally unlocked the secrets of Leonardo di Miragliano's fantastical contraption and started mass-producing!
I don't need there to be monster cav for Empire, but given the way GW is going I wouldn't be surprised by demigryph riders. I would really prefer a Inner Circle knight statline that would be worth taking. I suppose being monstrous cav would help, needing only 3 to make ranks. Though fixing up knights would probably require a basic rulebook adjustment rather than a statline improvement, since even the best cav in the game is still mediocre in combat resolution.