I was actually thinking more of the three first Oldenburger kings, although it can be argued that the fate of Eric lived on as a reminder through the example of Christian II. Christian IV, one of the most under-estimated Danish kings, was interestingly enough also threatened with the prospect of rebellion at one point of his reign.
1) Keep Philippa alive! Because of her possessions in central Sweden she usually acted as a sort of viceroy in the Eastern part of the union during the absence of the king. During her tenure she had the right to appoint feudal officials, which satisfied the Swedes. After her death, the local aristocracy became increasingly irate over the appointment of 'foreign' tax-collectors and bailiffs, which planted the seeds for rebellion.
2) Win the war in Schleswig and end the feud with the dukes of Holstein. The increased taxation for what was by many in the other Nordic realms perceived as a purely Danish matter was what spurred on the peasant revolt of Engelbrecht Engelbrechtsson, which eventually obtained the support of the Swedish aristocracy (which at first was rather hostile towards the lowly noble Engelbrechtsson). The Swedish revolt then set in motion a chain of events that led to Eric more or less declaring, "Screw you guys, I'm going to Gotland" and left the realms to become a pirate king in the Baltic.
3) Compromise with the Swedish nobility. Arguably, if the two first points are succeeded then this shouldn't be an urgent matter, but if Eric agreed to keep the feudal rights (the right to administer the slotslen/slottslän) in Sweden, solely for the 'native' aristocracy, he would've mellowed the nobility's hostility considerably. That's not exactly in character for Eric though. He firmly believed that he was governing the realm(s) as the constitution stipulated and any regress to royal authority was pervieved as a personal slight (he said something along the lines of "I will leave the realm as I received it from Madam Margrethe").
In short, keep the wife alive and busy keeping the Swedes politically satisfied, end/win the war in Holstein (easier said than done) to avoid peasant revolts in Sweden (and if it happens, break character and compromise with the Swedish aristocracy, even if Eric thought he was in the right).
All of this is not to say that Eric won't face more problems down the line. Aristocratic constitutionalism was just about to come to the forefront of the political landscape, so it's almost certain that a surviving Pomeranian union would have to deal with rebellions in Sweden at one point or another.
So, the question then arises, short of giving Erik a lobotomy, what would the best way for him to be to avoid getting deposed and more importantly, that his son can succeed him?
1) Keep Philippa alive! Because of her possessions in central Sweden she usually acted as a sort of viceroy in the Eastern part of the union during the absence of the king. During her tenure she had the right to appoint feudal officials, which satisfied the Swedes. After her death, the local aristocracy became increasingly irate over the appointment of 'foreign' tax-collectors and bailiffs, which planted the seeds for rebellion.
2) Win the war in Schleswig and end the feud with the dukes of Holstein. The increased taxation for what was by many in the other Nordic realms perceived as a purely Danish matter was what spurred on the peasant revolt of Engelbrecht Engelbrechtsson, which eventually obtained the support of the Swedish aristocracy (which at first was rather hostile towards the lowly noble Engelbrechtsson). The Swedish revolt then set in motion a chain of events that led to Eric more or less declaring, "Screw you guys, I'm going to Gotland" and left the realms to become a pirate king in the Baltic.
3) Compromise with the Swedish nobility. Arguably, if the two first points are succeeded then this shouldn't be an urgent matter, but if Eric agreed to keep the feudal rights (the right to administer the slotslen/slottslän) in Sweden, solely for the 'native' aristocracy, he would've mellowed the nobility's hostility considerably. That's not exactly in character for Eric though. He firmly believed that he was governing the realm(s) as the constitution stipulated and any regress to royal authority was pervieved as a personal slight (he said something along the lines of "I will leave the realm as I received it from Madam Margrethe").
In short, keep the wife alive and busy keeping the Swedes politically satisfied, end/win the war in Holstein (easier said than done) to avoid peasant revolts in Sweden (and if it happens, break character and compromise with the Swedish aristocracy, even if Eric thought he was in the right).
All of this is not to say that Eric won't face more problems down the line. Aristocratic constitutionalism was just about to come to the forefront of the political landscape, so it's almost certain that a surviving Pomeranian union would have to deal with rebellions in Sweden at one point or another.