Anyway, I'd argue that the 7.5% discipline and 20% morale/infantry combat stand out more so than that in the late game. AT decay and whatnot is more so an early game thing, but not an enormous one. Before ideas start getting filled Hungary's ideas are scarier than Prussia's, but that stops being true soon enough.
They are good, but not amazing. France for example gets the same morale bonus and only 2.5% less discipline, while having much better ancilliary bonuses like +1 diplo relations, -10% annexation cost, and -10% Tech cost. Ottomans gets 15% Discipline, 20% Infantry power and 15% Cavalry power. Yet everyone agrees that Brandenburg has the best land warfare NIs.