No, many of these are not bugs at all. Many of these are actually how the game works and how all BGS games have always worked. For example, content always materializes from the sky into the game world. Nothing new here and nothing new for BGS or various other companies. The content has to come from somewhere, after all. Since the content comes from above, you will have occasional instances of NPCs or other content landing on rooftops or other upper area barriers. Same with dead bodies being permanent in certain instances - that is intended, not a bug. Other bodies are deleted. This is better than older games where ALL bodies are deleted after a few seconds preventing you from looting what you just spent resources eliminating.
You have a couple items that MIGHT be bugs but may be specific to your game, as well, such as broken dialogue for some reason (i.e., if it is not experienced by others, it is not a bug in general but something that has happened to your specific game on your specific system).
This is also true for consoles and has been for some time. That is, the old mantra that all console owners should experience the same things is no longer true nor has it been true for several generations of consoles. The reason for this is because (1) there have been multiple versions of the same basic console for several generations and different versions have different architecture that could cause issues, (2) the consoles, like any electronics, are sensitive to heat or anything that can cause heat (e.g., dust, smoke debris, etc.) and different people have their consoles set up with different degrees of ventilation as well as different lifestyle habits/cleanliness of the electronics, and finally (3) the last couple generations of consoles are much closer to full-fledged PCs than just game consoles, thus they have a variety of different non-gaming software (and associated hardware) in them that can cause issues, but specific software apps may vary with each owner (or their specific usage concurrent with any particular game may vary).
Short version: "The more complex the system, the easier it is to have things go wrong."
This is also why any informed, knowledgeable person understands that the new normal is, in fact, that software has to be released in a form that will still have issues for various users because it is utterly impossible for any company, even huge companies like Microsoft, Google, or Electronic Arts, to test software on every possible user configuration out there. Anyone who cannot accept this should not try to use hardware and software today as it is a pointless endeavor for such individuals. They will only frustrate themselves when something doesn't work for them.
Now, for the OP... for what it's worth, and you seem to already be aware of this, the vast majority of users have found Fallout 4 to be incredibly stable with very few bugs, relatively speaking (relative to modern software as a whole, not only gaming software). However, you also know that there are some users who have problems, sometimes major problems, including users who still cannot get the game to run on their system for some reason. The issue in such cases is the specific nature of their system interacting with a game that is made for mass market, general (gaming) audience hardware. That's true for both consoles users and PC users, of course. I've listed some console variations and you also listed some possible issues. It could even be something as basic to mass market production as variance within specific builds of one console unit and the next in the assembly line. In short, it may not be anything Bethesda or any software maker can correct, at least in some cases. Hopefully, this won't be the case for you.