Moving will be made to interrupt spellcasting at a point in time...

[Shiggysonson]

Since it makes you glad, is there any specific reason why you felt this change was needed?

Because it adds more flavor~ to the battles. It makes fighting in groups more interesting. Before this change, people in parties were able be off in their own world, doing their own thing like they're soloing. Of course they were able to do this for other reasons too, but one factor that contributed to this happening was that healers were able to easily run around and support reckless gameplay. Now that we can't, the people that continue to play recklessly not thinking about position are going to die and think the healer's bad. And then the healers that feel like they're flawed because they can't do the impossible whine about not being able to do their job.

In other words, the ability to cast while moving was not balanced. Not just for pvp, but for anything that is done in parties. Why? Because it allowed people to do things they shouldn't be allowed to do.