I dont see the issue.
There has been more than enough time to meet the requirements for all allied races since their respective reveals.
Plus mechagon exalted comes with an essence so you could argue that there is more incentive to complete that rep than voldunai which just has an over priced mount.
And I’m speaking as someone who mained alliance and levelled up my horde alt just to get the rep for Vulpera.
If you don’t have the rep, it simply comes down to you did not want to go and get the rep. And that’s fine, but you dont get to complain.