My point is that they already have the rig and animations, it wouldn't be too exhaustive an experience to put them together, I imagine. As for additional VO, that might be a thing, it might not be. We also still haven't heard a thing about the "pig-like" mount (Likely Bronto) described, but if that's in then they apparently aren't being too restrictive.
Hey, I'm all in favor of having unique mounts to choose from (I really hope we get a chance to name them, like the dog in DA:O and DA:II...) so I wouldn't complain 
And I heard that it wasn't exactly a Bronto... one of the devs described it as a hybrid between that and a nug...!
I'm just a bit confused by the devs priorities... instead of spending extra time/resources to create unique mounts, I kind of wish they had instead given our companions mounts, too, to enable them to ride with us and engage in party banter. The whole disappearing act when I get on a mount is going to prevent me from using them, I think... 