What if the ancestors of the Huns had decided to turn south into the middle east or India? No Huns in Europe would have meant a stronger Eastern Roman empire and perhaps someone similar to Constantine the great would reunite the divided empire not necessarily through military might but through political maneuvering and such?
I assume that the mass amounts of German refugees would have been handled better and Britain might have been able to hold out longer, maybe even hire German mercenaries and support/transport them to Scotland/Ireland to fight off the barbarians and make it their own land while being allies for Rome?
Probably not but it's interesting to think what could happen if the Huns never came.
Another thing is if the empire was never split in two, would it fall sooner or fall much later? It seems to me sooner at least if you count the Byzantine Empire as the ERE but it would last longer than the WRE. If both scenarios were combined who knows what would happen but it would be nice to discuss this with people, I may even make a TL for it in the near future if I can get enough conversation for it going.