Commiserations Dave. I don`t doubt psneeld`s optimal options,(#115) and I lack knowledge of how the barrier coat adds to the problem. That someone decided to barrier coat the boat suggests there was a problem emerging, but that is conjecture.
My repairs in 2011 were done over 4 weeks in conjunction with other work. Each blister was deep concave ground until the wetness stopped. Judicious heat was used to promote wet oozing. Eventually each dry crater was filled with layers of mat and epoxy. At the time there was evidence of prior repairs, few if any of the blisters were recurrences. At haul out 2 years later all was well, no fresh ones, no recurrence, compliments on the hull condition from the shipwright. (Note the IG hull is about 1" solid f/g.)
Hard to say what is the best move, it might be worth fixing what`s there, and seeing what develops, rather than a full peel and rework. Soda Strip is popular here, as my work proceeded the guys doing it and I decided we should(using 20/20 hindsight) have gone that route. Especially if the barrier coat has to come off. Good luck.