According to this sight it is AJ Fernandez.
http://robustojoe.com/cigar-blends
Here's a cached page (no longer live) from cigar.com
“The tale of the tape…”
When Cigar.com billed the Nica Libre as an alternative to the Padron Anniversary maduro, I just had to see this for myself. I mean, how could a $2 cigar stand up to an icon of cigar supremacy costing four times that amount? Was this a case of David vs. Goliath in the valley of Jalapa? Upon learning that Abdel (A.J.) Fernandez was the brain behind the Nica Libre blend, I promptly ordered a box. I have enjoyed everything AJ has created from the Padilla Habano to the Sol Cubano Cuban Cabinet, and felt I had nothing to lose by getting a box of the Libre, sight unseen, especially at $2/stick.
This sampler also indicates that AJ is the blender
A.J. Fernandez Dirty Dozen Sampler (12 Cigars) $29.95
I have found nothing to the contrary of AJ being the blender.
I am telling you AJ Fernandez is following the footsteps of DPG. JMHO of course.