So, with BfA alpha further along in development, it's looking more and more like Blizzard is going to implement a sizable number of additional Allied Races.
Now, earlier when Blizzard opened up the Legion Allied Races, they increased the per-realm character limit by 4, to allow a player to have one of each additional Allied Race.
I personally feel that it is foolish to simply increase the per-realm limit each and every time Blizzard decides to add an additional race and class - it's akin to stocking a product ONLY when a person orders it, rather then keeping the product in stock beforehand.
So, I feel that Blizzard should remove the per-realm character limitation. 50 characters per account is still fine, but players should be free to put all 50 on a single realm if they so wish. Perhaps it can cause Blizzard to add some API for the realm screen?