Although its hard to say what dalaran had become like when Jaina was its leader, on a community level, we know her hatred for the horde had caused the rift between the elven factions in it, so I don't think its much of a stretch to believe any race in dalaran that could be associated with the horde would have been treated like criminals and locked up in the violet hold at best, we had evidence of that back in mists when we saved the sunreavers.
Now, looking around dalaran now under khadgars rule, its obvious the city has become a lot more mixed in terms of its community, even more then it was in wrath days. In wrath, we'd see the occational mixture of other races wandering around the city, but mostly the occupants in the shops and businesses were all mostly human or elf, given the status of the city, it has been a human and elf run city for a long time.
Now we see tauren, forsaken, goblin, worgen, blood and high elf, troll, orc, dwarf, pandaren, all races part of the dalaran community, and I just think all this came most recently from khadgar opening the city to far more mix of races. Its something I'd have liked to have seen played out.
Its funny how remembering Jaina saying back in mists how she hoped to have dalaran as a beacon of hope for the rest of azeroth coming together, and yet from the get go she let her 'betrayal' from the sunreavers break that, since its obvious from how dalaran it today, with all races coming together in it, she was wrong, and the city now stands exactly as she originally wanted it to be. Kind of ironic khadgar did what she wasn't able to.