When it comes to balance, the Horde now has more areas than the Alliance, so please.
How would I do it?
-dark shore
-Eshental
-Mt. Hyjal
-winter jump
-Felwood
-Moonglade
is completely recaptured by the night elves. Teldrassil cannot be restored, it is not possible. It therefore remains as a memorial to remember the War of Thorns for all eternity. Also, the druids erect a huge border wall reminiscent of Ahn’Qirai, which closes the eastern border to the wasteland.
Stonetalon has regained a split frontier function: The northwestern part of Stonetalon goes to the night elves, while the far southeastern part goes to the Horde.
Desolace continues to function as a neutral place under the leadership of the Circle, so it is not officially owned by either the Horde or the Alliance. The Circle forbids any construction of fortresses there.
Feralas would also be divided. The natural boundary is Diremaul. Everything east of it is Horde territory, everything west of it is Alliance territory.
The Alliance leaves the southern barrens, and retreats into the night elves’ areas in exchange for leaving any hordetroops from Arathi and Gilneas.
The Horde opens up the Un’Goro Jungle
The Horde ala Gorgrond builds a huge railway line along their empire from Orgrimmar down to Un’Goro.
Silithus and the outgoing Azerith are banned for all time by a blocking agreement between the Horde and the Alliance.
Silver Forest is repaired by the undead, the tomb serves as a new seat until Stratholme is conquered. (To make it the capital of the forsaken-state)
Even undercity will never be rid of the plague, what is above ground is only a fraction of the actual damage in the lower area. The explosion made the whole structure unstable.
Sylvanas will be brought before a court of law
Saurfang will be brought before a court of law
Nathanos will be brought before a court of law
However, this time the judge, plaintiff and defender will not be a pandare or the four lofty ones, nor will the alliance. The Horde will accuse and judge itself.
Anduin loses his seat as High King to Jarod Shadowsong, who will lead the Alliance’s military forces.
The Alliance reforms and reinstates the Alliance Council.
Calia Menethil will act as ambassador between the undead Forsaken and the living humans.
Last: The Alliance will officially abandon any territorial claim over the kingdom of Lordaeron as long as the Forsaken remain within their new borders and do not attempt to expand.