Plushy, in the tweets you link it's not always clear what the users' opinions are regarding the pupils. Unfortunately a census of posts isn't a good replacement for a "poll" of user opinions on something so specific. In either case, what's most important is that the developers keep their promise that the updated characters will resemble the old ones. Doing otherwise creates a disparity between words and actions that erodes trust.

From a technical standpoint, what I'm guessing happened is that Au Ra currently don't have a unique eye texture like they do in the current build-- they currently use the same diffuse map as Hyur, Roegadyn and Elezen. To me this implies (but does not confirm) that the asset is incomplete/unfinished and is likely to be changed, as other assets have been updated to include unique racial characteristics over time. However, anything could happen. I hope that both large and small pupils become available, as it's clear you really enjoy them.