[X] The Emperor oversteps. The Archduke deserves a fair trial under the law, and his peers in the Reikland Diet are entitled to hear the evidence and have their voices heard. To depose a vassal by force of arms absent such processes is nothing more or less than tyranny.
[X] The Emperor has the right. The action is legitimate, and if the proper forms were not followed, you can only trust that Karl-Franz had good cause to bypass the Diet and enact such a summary judgement upon his wayward vassal.
[X] Ours Not to Reason Why. Regardless of your own thoughts on the matter, it is not proper for the affairs of high nobility to be banded about by a common barge master and his crew. You cannot stop them from gossiping, but you can at least refuse to encourage it.