As you may have realized the Blood Elf racial has been really useful in dungeons since it’s release. If you haven’t kept up to date with the latest BFA changes, now removes 1 beneficial effect from all enemies instead of silencing mobs for 2 seconds. This puts into question if Horde will keep their king faction status for Mythic+.
Some like to think Alliance may be taking over in terms of racials because Horde is losing Arcane Torrent but Arcane Torrent isn’t necessarily useless. It will be useless in a lot of cases but could be very strong in certain dungeons. I have personally been spending a lot of time on BFA Alpha/Beta and there is a decent amount of dungeon trash that you can utilize Arcane Torrent on.
Alliance has
Shadowmeld. This is a strong M+ racial since it lets you skip some packs of trash very easily without having to incur a 10 minute cooldown on your potions. You can even
Shadowmeld a mechanic over to someone else. For example, if you get targeted by
Arcing Bolt and realize you don’t have any defensive you can
Shadowmeld to make it retarget another party member. That really is the only good racial for alliance currently. Dwarf
Stoneform is a pretty decent one for grievous weeks but isn’t always useful. Even the newly announced alliance allied races racial aren’t really looking great in a Mythic+ scenario.
I predict that Horde will still be the dominant faction since they also have the best dps racials between the two factions. To top it all off horde recently received the new Nightborne racial which slows enemies by 70% for 12 seconds, this could lead to you being able to pull big and just kiting the mobs just like in Neltharion’s Lair where it’s basically known as a kiting dungeon in high keys.
With this said, keep in mind that it is still pretty early to have a good statement on this since Mythic+ is not accessible on the beta client and some racials still haven’t been added for the new allied races.