At least Karol Ferdynand got one last chance to do what he loved before he died. Perhaps he'll never be one of the Commonwealth's most beloved monarchs, but in many respects he was exactly what the country needed after such terrible strife.
Svitrigaila's reign isn't off to the best of starts, what with a pretender uprising popping off right as he assumes the throne, but I have a feeling this would-be usurper is less of a real threat than he would imagine himself. The young king's stats line, combined with his ties to a famed military house, have me predicting that we're going to see the Commonwealth try to flex its muscles once more -- perhaps even some expansion eastward at the expense of the Russians or the Crimean khans is in order?