I want to re-post someones previous post on the other thread because though I don't think its directly simular, I do think it speaks volumes in terms of demand and priority.
High Elves have been requested Alot more than straight back orcs have been, Out of a forum search of these forums alone the Orc request came up with a mere 185 posts / 19 pages of requests since 2011, Where as the request for High Elves came up with a staggering 3769 posts / 377 pages since the same date 2011(its as far baack as the forum goes).
https://i.imgur.com/JqvRVg3.png
Who got their request answered, The Horde of course.
Like I said, it's not exactly the same case, but blizzards reasoning for giving orcs a straight back was purely based on demand according to the lead art designer at blizzcon, and since it's a task that required animation work and not just an exchange of visual assets I doubt the physical work load is very different in all honesty. From an artistic perspective involving textures and story the high elves require more work, but what is that compared to the altering of the skeleton of an existing model?
I think it's interesting atleast since the demand is alot higher for high elves.
I do think some blues should actually pay attention to this thread though in order to clean up non-constructive posts. Theres alot of them.