Thus, as a general rule, the more chronic your akrasia, the less likely you will be helped by any kind of method that is not aimed at a "one time pays for all" elimination of your conflict source(s).

Akrasia has various strengths; so too would a meta-akrasia. An akrasia strong enough to defeat GTD or Pomodoro techniques may not be strong enough to defeat a guy you've paid a lot staring at you and waiting for you to do the next easy step. The people who would feel the need to go to such workshops are a self-selected group.