With no PoDs prior to the reign of
Amenhotep III*, and preferably not before the Assyrian King
Ashur-ubailit,** how can the Assyrian rebellion against Mitanni domination, and subsequent domination and conquest of the Mitanni, be prevented? Given this PoD, let's say the Hurrian Empire continues to endure for another century or so, right up until the events of the Bronze Age Collapse (which, broadly speaking, still happen).
Can the Mitanni Empire, which just managed to avoid being overthrown by Assur, continue to survive without the complex economic and political ties that defined the Bronze Age? If not, is the fate of their now devastated realm? And how does this affect other Bronze Age Civilizations -- for example, can the Kassite Babylonian Empire now continue to endure (without the threat of being conquered by the Assyrians, as was their fate OTL)? And with all these changes taken together, how are the subsequent "Dark Ages" (the next six centuries of history in the Eastern Mediterranean and Middle East) now altered?
*began circa 1390 BCE -- but that was as a child, so let's say 1380 BCE or so
**began 1365 BCE