What kind of reasoning is that? Even in beta it was quite clear that most players don't enjoy the tanking gameplay. While adding a mount is all well and good I think it'll do little to make the gameplay of tanking any better.

Also how many mounts are they making?! As a lvl 50 war let me be the first to say that I'd prefer adjustments or skill changes to tank any day of the week over a lizard to sit on.