I agree but I quite sure that it wont work for all people. No drug does. And if it does work, that doesn't mean that one can't have bad side-effects that make taking the drug impossible. However, for one thing you do not know whether it will work on you or not, and another thing is that if it works for lets say 40-50% this means money which means more research. One drug coming out could mean several drugs following.
@benryu makes some sound scientific reasons why it would work for most (see Retigabine thread). Also, Phase I trial apparently passed all the safety tests.
Opening KV3 channels could be the key for most etiologies of t.
So, while it is good to err on the side of caution, let's also try to keep the hope alive. Sometimes, that is all we have.