Swimming Horses, Tigers, and Kodos?

With the PTR (Public Test Realm) up and going there are many changes already being noticed by the players particiapating on it.

One of the more mentionable changes is the fact that mounts will now be able to swim and will be coming out with some aquatic mounts so that you can go faster while swimming. Personally, not just as a Druid, but in general it's silly and unnecessary. Might turn out to be a good idea, but won't know until tested further.