For the time I played Viera the thing I found most odd was just how stiff the ears are when moving around. Like when fighting, running and dashing. They really should bounce a bit more. With the lop ear option being the bounciest.
Even if they don't make the ears more emotive while emoting, they should at some point update the ears movement physics at the very least. It would really make them feel more like a natural part of their body than just something stuck on.
I mean given the size of their ears they are about on par with a tail. So, I can just imagine how much less popular the Au ra would have been if their tails had been stiff as a board when just moving about.