Originally Posted by
Mehrunes
What you're proposing is not how fighting works. The factions did make a plan when it made sense and they had an opportunity to do so. I.e. before the fight. That plan went to shit because Vizuul summoned multiple Legion spaceships that obliterated the Horde position. The Horde did the only thing they could under the circumstances and retreated. Properly warning the Alliance with the sound signal (that Varian immediately recognized). What else would you want them to do? Hold a conference as to how to proceed during an ongoing battle, with spaceships shooting lasers at them? Without being able to even reach the Alliance as they were separated by a ridge? Your accusations against the Horde make no sense and go against basic logistics. Also, Sylvanas didn't "do it very much on purpose" because Vol'jin was the one to order the retreat.
Also, while the Alliance could have used Vindicaar to break the walls (though with Jaina's ship it would have been redundant), if the story had no holes in it the Alliance would have been obliterated before even landing in Tirisfal, as the estimate of naval powers in A Good War put the Horde at an advantage, with Saurfang stating they could even defeat the Alliance navy right next to Stormwind, where Alliance would have had home turf advantage with shore defense forces to aid them. Not to mention stuff like how as per the established story only Dreadlord magic can protect one from the Blight or how Alleria warping in with Gelbin didn't actually do anything to alleviate the issue Anduin's force was faced with when they ran into the breach and got confronted by Nathanos.
Sylvanas allied with unturned (and dead, then resurrected Gilneas). Genn was already a Worgen at that time... Also Sylvanas didn't turn his country into a toxic wasteland. She only Blighted the city. Which was already fine by the events of Silverpine storyline. The Forsaken can clean the Blight most of the times. The only instance where they couldn't that we know of was in Southshore, where they accidentally used a surprisingly strong strain of the stuff.