It is no way disruptive, this is simply a change of how people used to kill faster.
We went from Bahamut spam to this because as I said months ago, it takes a lot of damage resources to kill melees now so taking a class that can pull players and able to AoE burst efficiently lead to this.

A bunch of solo players teaming up and coordinates are no different than a premade for example and them learning that being able to full nuke a team with right tools is no sign of disruption.
I play in Light DC which is notorious to have a certain premade dominate but for a damn good reason:
Coordination, people marking themselves and putting markers on maps. I actually enjoy being able to follow a coordination and pull something as well being able to fight against the premades if the people are willing to actually play serious and not waste time in self defeat or just blindly feed.

For actual changes, CC needs to dial down or at least have more ways you resist including to pulls like War's chain etc