So Juanca has finally abdicated, official immediately. It was a 'surprise' announcement which shouldn't really have surprised us at all. The timing was obvious: a week after the EU elections, so as not to get people thinking too hard about how they want to be governed. This would have been agreed by the twin pillars of a crumbling political system: the PP and the PSOE.
This is the key gesture launching a process which will attempt to preserve the status quo against serious threats including the royal family's declining popularity, the failure of the bipartisan political system and the Catalan independence movement. The plan is probably to have a quick succession, coronation and then a series of constitutional changes 'proposed by the new king' in order to reduce the increasing discontent across the country. I'm not sure that they haven't left it too long.
Has no one told Rajoy that he should be next?