Just gonna go ahead and say it......
Lordaeron has NEVER belonged to the Alliance since the beginning of WoW, does NOT currnetly belong the Alliance and will NEVER belong to the Alliance in WoW's lifetime, nor SHOULD IT.
No. Using game mechanics as a reason for people to just give something up like taking back a well remembered lost nation isn't suitable. Through the lore, retaking Lordaeron should be a goal for the Eastern Alliance. Lordaeron was the birthplace of the Alliance, many of the current adults remember Lordaeron with fondness and should want to see it returned to the Alliance, and the destruction of the Forsaken.
Sure as long as Alliance PLAYERS have the temerity to realize that it's never gonna happen in WoW's lifetime(due to game mechanics) and quit crying about it.