I finally have managed to get caught up with Regeneration, and one again I'm finding myself breathless with anticipation for what's to come. You've thrown some very nice curves - love the introduction of Arik Soong - but where the story shines is the characterization. The Denobulans are complex, with motivations far outside the overt demands of the story, and the little things just add to their depth. Polly is wonderful as always, but it's good to see Archer in his element, confident and sure of his place. And the setup is perfect, gently pulling us into the main plot bit by bit with each installment.
I'm sorry it took me so long to get back to reading this story. I will try to keep up with each future installment.
Looking forward to reading what happens next!