I hope the Polish Inquisition (No one ever expects it) wont kick Austria out of the 10 playable factions.
While i could disagree on Austria being the first european continental power (i'd put france at that place), definately they where a key player of that time.
Who'll fight the Ottomans ?
Who'll keep Prussia at bay ?
Who'll be between France and Russia ?

Besides, even if i hate Talleyrand for his treason, i'd love to make a what if senario : instead of France waring on Austria, i'd like to have France allied to austria during the napoleonic wars.