Actually that could be a good idea.
He earned that title after all.
Well I for one could see Tyrande as a rising leader maybe, it still bothers me that Blizzard didn't made her character worthy enough lately imo.
Tyrande has everything she needs, Blizzard just has to use her.Now it`s too late to give her what should have been given from the start - the rank of Supreme Military Commander - but Blizzard can make her Second-in-Command at least.
The Alliance has a much bigger pool of characters, you don`t know how much you are losing because Blizzard is monopolising Humans.
If in the Horde, who is dominated vastly by Orcs, we have seen character development for Vol`Jin, Bane, Lor'themar and his inner circle and Sylvie I can`t see why the Alliance can`t benefit from the same treatment.
You guys lost big time in the story because the Horde got lore quests while the Alliance got parodies and tribute quests to shows and movies and only Varian got the spotlight.
Now they have an angry Horde fanbase because we got to play the bad guy and the Alliance fanbase still senses that something is missing even if they are the declared winner of the conflict.
The Horde could have benefited from not being the bad guys and the Alliance from development of all characters.
EDIT.
OK, who voted for Anduin?Who`s in a mood for jokes? EH ? He`s too naive and idealistic for the moment, with maturity and life experience he can become an outstanding leader but now he`s too raw for something like this.