thanks again and happy holidays to you too, it was a pleasure to answer you, because the topic is really interesting, it is unfortunately little used, furthermore as an Italian it bothers me that people think of the HRE as only for Germany, because if that were the case, what sense would the crowns of Italy and the imperial one have ?, why did the Otl Habsburgs ""waste"' a lot of blood for the Italian wars ?, why did Max and then Charles want to be crowned in Rome at all costs ?, Frederick II himself (my absolute favorite sovereign) according to this reasoning does not exist ?, given that he considered Germany a barbaricum compared to his Italy, what did the many Emperors who during the Middle Ages came to Italy several times, on holiday by chance ?, certainly not !
however, remaining on the topic, I would say that the Habsburgs / the imperial office would have had an easier life if one of the following 3 things had happened : the first is a Frederick II who lives longer, manages to subjugate yet another Lombard league and decides to make another trip over the Alps to control the situation in Germany, this alone would have allowed an easier government for his successors, because even with the chaos of Otl, at least the bases would have remained, the second is that another Frederick, the third with this name, had been more proactive in his imperial policy, I'm not saying a lot but at least a bit more than Otl, allowing his house to be stronger within the Reich, perhaps facilitating Maximilian's subsequent government , the other concerns instead the maintenance of a policy conceived by the first emperors, namely that of giving possessions in Italy as a fief to the German magnates, so as to further tie them to the imperial faction, in particular if they want to maintain control over said territories, this in turn it creates links between the two nobilities of the empire and increases their interest in remaining cohesive, there would be many others, up until Charles IV ( 1 ) or Sigismund I of possible changes to have an HRE equally concentrated between Italy and Germany and directed towards centralization, even after this " limit " period one could intervene in this regard but with much more difficulty, my solution is just a simple compromise route that I think is technically suitable and feasible in any pre-Protestant Reformation period of history HRE, but even after it, I basically created a discussion on the Habsburg ideas to deal with the political chaos created by Luther and Friends, in particular on Charles V
1 ) for example, many Italians were very angry with Charles of Luxembourg, because he visited Italy and Rome for very little time, compared to his predecessors or successors, just as he was not very active in local politics, which was poorly tolerated, given that technically he was the guardian, referee and legitimate ruler, even more so in this period that the Pope was not physically present in the peninsula
If you want, when you have more questions about it, I'll try to answer you if I can 😉, This discussion does not deserve to be overlooked 😇