However in the current situation there is no option to disconnect drive in event of stuck / full un commanded pedal.
Funny this should come up. During my training, I asked my instructor how often a helicopter suffered a stuck pedal. He said he'd never heard of it in 21,000 hours of his flying. I asked then why so much focus on yaw control failures. He said he'd asked the same question during instructor training, and why no training for stuck cyclic or collective (also apparently extremely rare. There was no good answer to the question. The stuck pedal training seems a solutions looking for a problem. It's fun training though! 'Builds skills!
So now we introduce a tail rotor emergency turn off switch (guarded, I hope). What if a spinning pilot cannot reach it? What if it suffers unintended operation? 'Seems to introduce more failure modes than it solves!