Perhaps, but the Nightborne favouring the Horde was pretty obvious. Tyrande rejecting them, making it clear the only reason they're helping is to defeat the Legion, not to any loyalty to those that had abandoned them to focus on saving their own arcane power, something that largely hasn't changed at all in the ten thousand+ years they've been under the dome.
Meanwhile, Liadrin was sharing their similar issues with addiction to magic, tear own origins of leaving the greater Nightelven people to continue to practise arcane magic.
On top of that, in patch 7.3, you see one of the Nightborne (I think it was the telemancy elf?) standing alongside Liadrin before leaving Azeroth and during the 'Arrival on Argus' cinematic.
Also, the others are kind of self-explanatory. The tauren-with-different-antlers would join the other tauren. The Light-Draenei would be working with their kind, same with the Dark Irons and the Trolls.
And before people claim that the Lightforged and the Highmountain tribes should be neutral because of what the player has done, no. The player was on the Isles as a representative of their class hall, not their faction. They like you, yes, but they aren't going to join your faction. Baine and Anduin get along great, but Baine isn't joining the Alliance because of Anduin's actions in saving them from Magatha's attempted coup.
the only ones that don't really make sense are the Void Elves, and we all know that's because Blizzard want to just shut up the "High Elves should be playable on Alliance" crowd.