I played as Austria and fought them in one of my Games in the Demo. I beat them badly early,(wiped out entire armies) but when my MP ran out they kicked my butt. In that Game the French King was a God of War. 4/4/6/2 or something like that. Never could Catch him after winning a battle against him.(Pyrrhic Victories, me on defensive good terrain and reinforcing doomstacks)
BBB should be a problem for everyone during this timeframe. It basically took everyone to keep them in check. They are the LARGEST, Wealthiest, Culturally Homogenous, collection of Provinces in Western Europe.
They have missions and Cores on most of the really wealthy provinces in Western Europe also.
IRL after fighting England. It took Coalitions of major Powers to keep them from Blobbing.
15th and 16th Centuries: Spain and HRE. France thought they were being encircled by Hapsburgs........defending against the BWB.
17th thru mid 18th Centuries: England/Great Britain, Netherlands, HRE/Austria Fought to a draw.
Late 18th and early 19th Centuries: England, Austria, Prussia, Russia fought them to a Draw (Status Quo Antebellum) after losing to France badly Early on much like Allies in World War II against Germany.
See a theme here.....It takes 2-3 Major Powers to keep France down.......That is why the BBB is the BBB.
If the AI in this game is competent.......I can't wait to see the Ottomans are OP threads. Think France except Hideous shade of Green and Muslim.......IRL Hapsburgs REAL fear.
Did I mention France and Ottomans were Allied for a time..........