I tried AVRT and found it wasn't for me. I couldn't get with the program, mostly because I never experienced my addiction as a beast or an alcoholic voice. Nothing wrong with the program.
I found Addiction Alchemy, chakra work, and guided meditations a HUGE help to me...others find them senseless garbage.
Sometimes when I get a resentment, I run a step four on it, other times I write a Haiku about it.
I totally relate to what your therapist brought up about all/nothing thinking...that was a HUGE issue with me early on, and I didn't see it, once I came to see it...I can keep on the lookout and when I get into freak out mode and I can call BS on it.
I think that's one thing I like about even the name Addiction Alchemy...the concept of working with lots of different "tools" from various areas of life to reach the goal. Not a locked step, do THIS or die, method.