Actually I'd say more people have made Yularren in white on white than white with black pants... It's at best 50/50 anymore but back when the hobby was really in its infancy it seemed most people went with the all white duds... What I think supports the criticism though is Yularen's backstory as an ISB officer and then the backstory of the ISB uniform is the black pants/kepi with a white tunic, and then the backstory of the all white uniform belonging to the Imperial Grand Admirals... Since Hasbro follow the EU enough to flesh out other "unseen" aspects of characters, I think it would've been nice for them to have followed it with this one. To the best of my knowledge I've never seen a shot of Yularen standing on the set though... Not much footage from that sequence was edited out that I'm aware of so not many stills seem to exist from the sequence.
To be honest I find the lack of a removable hat (I'd love a good removable Officer's hat in this line someday from a customizing standpoint) for Bast to be more disappointing than the color of Yularen's pants...
I've actually yet to order this set myself. I need to get on the ball with this soon.

Not many in my local group were wanting to do a group order to save shipping because of the set including 3 figures nobody wanted and 4 everyone wanted but were obscure... I'd really like to save where I can on these because of the 3 pack-ins that suck.
