What gets me is that the answer was obvious the entire time: Godfrey. If ever there was an appropriate time and place to bring a character back from the dead, this was Godfrey’s time. Have him ruling the lands of Gilneas as a Scourge Warlord, bolstering his numbers with the dead of the Fourth War.
Hell, have him dance Liam’s reanimated corpse in front of Genn in an act of flagrant malice that makes the fact Sylvanas unintentionally killed him superfluous. Watching Genn rip Godfrey apart for THAT would bring some excellent closure to the matter. Maybe he couldn’t save his son’s life, but he can spare him undeath.