Do you understand how electricity works? If the guy is holding a sub too long and gets tasered, then the fighter caught in the sub will get tasered too. Do you think it makes sense to taser the guy who's about to lose a limb or is unconscious?
All that needs to be done is for the punishments to become more severe. The AC should decide that as of a certain date, anyone not letting go off the sub gets a 1 year ban followed by a lifetime ban if it happens again. I've been a fan of Palhares for a long time but I don't think it's fair to allow him to continue fighting.