I think the main shocker in this one was that for the first time, the rebellion was supported by all three Dukes. In the past, it was usually just one seditious Duke, riling up his duchy and eventually failing because the other two Dukes did not follow, and joined the loyalist side.
Well the third rebellion had 2 out of 3 Dukes, and was in planning for a very long time, as a worst-case precaution, but if it wasn't for a particular Amaury, it would have succeeded....
