How was that strategy implemented for Monks and Pandaren when Monks have no unique aesthetics for a given race, and is available to 90% of races?
Again, look at Zalandari Trolls; They got unique dinosaur models for their Druid class, and they are among the most popular Allied Races in the game, only beat out by Vulpera and Void Elves.
Their most popular class? Druid by far.
Speaking of Vulpera, if Blizzard is truly concerned about class population, they'll let Vulpera be Tinkers. Supposedly Blizzard has a lot of former developers from Wildstar, so a Fox-like tech class wouldn't be too far out of their depth;