For the rest, I'm certainly not opposed to everyone getting what they want. Honestly I can even understand the people who want more youthful looking characters since what I picture when people request it is late teens like Alphinaud, something about younger characters facing dangerous situations is heroic, look at a lot of popular stories, games, or movies (the Eragon /books/ the legend of zelda games, even various other final fantasy games.)
With Viera we got what we were never even actually promised simply because people wanted it so badly, and one way or another there were going to be people who would be unhappy with that since there are a lot of loud voices unhappy with most everything.
I personally like the way Viera fit neatly between Elezen and Highlanders, because when it comes to it that's exactly where they belong: still fit but not the way highlander girls are, still tall and graceful but not as tall as Elezen girls (unless you count the ears, then they are probably the single tallest race.)
Then they also have the ability to be really stunningly beautiful like miqo'te and au ra characters, or fierce/stern like roes and highlanders.. so literally most everyone can find something to like in their design because the characters you are able to make capture most all of the best aspects of every other race to date.
That said..
I will also agree that it would be nice to see older races get a bit of polish but that is a touchy subject to approach in an mmo because people come to feel such an attachment to their characters.