Got it in 1844. Instantly achieved a ton of political reforms that would've taken me decades to achieve otherwise. Plus I was now a cultural union country so most of the German minors joined me within a few years and I finally got all of them in 1854. Only had to fight a hemogony war with Austria over Baden as it was the only minor I couldn't knock out their control. Of course, it was a cakewalk having already annexed most of Germany. If the AI favored taking the gutter crown, I bet we'd see a full or nearly full Germany forming a lot more often.