It's the simple fact that by releasing a client to the general public that shows the potential of having every single debuff removed from the game along with shotgun projectiles and almost any other of choice is this simply accessible that it will potentially force Realms hand into preventing them all from being blocked via client,for example what happened with the no more teleporting in the nexus. This would potentially have a huge impact on all client users.
It is also for reasons similar to these that I and I would imagine other respected client releasers have restrained from releasing a client of this caliber.
,On the other hand who knows maybe nothing will happen and I am wrong (I certainly hope so), but i would worry I'm wrong especially with a new team put in place by kabam who are I'm sure eager to prove themselves.