Oh shit that's a long time on the poison. Have you considered ibogaine treatment, I wonder if it would work with methadone too?
Yeah, ibogaine doesn't work as well for methadone. The ibogaine detox in my area is 8-10 days inpatient, they strongly recommend you to switch from methadone to a shorter-acting opioid for 3 weeks beforehand, you have to stop all drugs (including the opioid) 1-2 days beforehand (longer for some drugs), and it's prohibitively expensive.
Also I've used ayahuasca, which works in a similar way to ibogaine but is less dangerous and I was able to take during my taper, and while I found it very helpful mentally and would recommend it for addiction - it helped with reducing cravings for heroin (I never really get cravings for methadone, just cravings for heroin) and making me able to better mentally bear the withdrawal symptoms and stick to my plans to taper - for me, I only found it a little helpful for the actual withdrawal symptoms and only very temporarily. Perhaps it would be more helpful in that regard for someone quitting a shorter-acting opioid.
I would say the price.
Here is a link (if you haven't already read it), that might help with the Lyrica decision.
http://www.bluelight.ru/vb/threads/497568-Lyrica-and-opiate-withdrawal?p=10280232&viewfull=1#post10280232
Thanks

I guess my main concern is that Lyrica has a high prevalence of side effects. Many of the side effects sound like things I really do not need more of during opioid withdrawal: suicide/suicidal thoughts/behaviours, depression, agitation, muscle twitches, tremors, increased heart rate, sweating, flushing, rash, muscle cramps, vivid dreams, irritability, parasthesia (sensation of tickling, tingling, burning, pricking, or numbness of the skin), nausea and vomiting, fatigue/weakness, and an abnormal increase in sensitivity to stimuli of the senses. And there are many others - those are just the side effects that sounded a lot like opioid withdrawal to me.
Also I've heard some people say the withdrawal symptoms from Lyrica were worse than benzo withdrawal.