Have you guys noticed that in Legion there's a huge increase in movement impairing spells that cannot be removed with Blessing of Freedom? There's tons. A proc from a trinket from some World Quest that slows attackers, even mob abilities (the slow from mobs in Shala'nir in Val'sharah), an "aura slow" from a world quest boss in Azsuna (can't remember the name, but it's in Faronaar and you take a portal to get to him).
These are only examples. There's many more spells and abilities that slow you and BoF doesn't seem to have an affect on it. Is this a bug? Intentional? It makes BoF absolutely useless at times and it's annoying.