Having just finished Southshore, I'm kinda sketchy on this one.

As Putress proved at the Wrathgate, Sylvannas doesn't have full control over the Forsaken. Just as she gives lip service at best to those over her, her underlings also do their own thing.

She was working on the Blight, but Putress beat her to it and proceeded to ruin any hopes of her being seen trustworthy.

She is using some variation in Silverpine. She completely ignores Garrosh and convinces Cromush that this is quite effective and let it slide. Everything is going well. The land is in ruins, but there is no bat$#!^ crazy person in charge. This is why Sylvanas looks up to you so much despite the fact you are 65+ levels of experience lower. You are not bat$#!^ crazy.

At the end of Silverpine though, she withdraws from the front line to reconsider her perspective. So what happens? They overdo things and then are "oops, I used too much Blight". I swear, leave the Forsaken unsupervised for one minute and it's worse than a gnome and goblin combined. Talk about brain must have rotted before being raised or something. I mean we do take out the Warden in Hillsbrad because he's so loony even Sylvannas would have been repulsed.

So while Sylvanas fully inteded to take out Southshore, just as the Alliance took out Taurajo, I almost have to wonder if she approved of the method (the overkill, not just the use of Blight) at all or was like, "well, I did say take it out and it is taken out. Too late now to worry about it." I think the Forsaken disinterest in morals is what makes this seem so much worse than Taurajo. I am betting both wanted to avoid what happened in Taurajo and Southshore, but only the Alliance is capable of feeling guilty at how things played out.