The second is the importance of nationalism to Hoxhas success. By all accounts his government was struggling in 1947-8. The Yugoslavs barely could manage their own reconstruction never mind Albania's. By breaking with Tito and siding with Stalin, Hoxha not only stuck it to the Serbs but also gained far more aid than he would have received from Belgrade.
Had the Albanians not done this they also would have lacked the intelligence from Kim Philby that enabled them to defeat the Albanian subversion. Xoxe would need to have a lot of things go his way in order for him to forge a lasting government and not be a mere interruption in King Zog's reign.
Kim Philby exposed anti-regime plotting. Maybe the PoD is he is caught earlier.
Or, he is doing the Albanians no favors because they have a Tito aligned rather than Stalin aligned leader?