I just got my recall service performed and I'm completely satisfied... for the moment. 🙂
For the record, my dealer performed a visual inspection during an earlier visit and determined that my shocks were not leaking or showing signs of damage. They did have some icky residue on them, to which I ascribed normal road grime accrual. I returned to the dealer yesterday to have the recall service performed, which was completed for free, despite having aftermarket components (skid plates) installed. Here are a few before and after photos of my rear shocks.
Passenger Side Before & After:

Driver Side Before & After:

Driver Side Rear Before & After:

Shield Front Closeup After:

Driver Side Closeup Side View After:

Work Order Notes:
It would appear that the recall service required the technician to apply "sili" to the shocks. Silicone? Silly Putty? Who knows? Then they installed a hard plastic or rubber sleeve, a.k.a. "shield" over the existing shock and reservoir body. It appears to be fastened with nuts and bolts (not chicken wire and papier-mâché or Kleenex and spit as I originally mused) and completely envelopes the original plastic "BILSTIEN" reservoir covers. It looks somewhat sturdy in my opinion; time will tell how well it holds up.
Would I have liked replacement shocks? Yes. Did the condition of mine warrant that? No. For my needs, it is a satisfactory preventative maintenance exercise. All that said, I am entertaining the idea of replacing all four shocks with Fox 3.0 units, similar to those found on the Wildtrak and other premium trim level Broncos in the future. However, given their price tag, they may be Fox 4.0 or Fox 5.0 by the time I'm ready to afford such an upgrade. LOL
I hope my photos and description help manage everyone's expectations when it comes to the Bilstein shock recall campaign. 😎
PS - For those in the know, the dealership torqued ALL of my lug nuts to factory specs prior to my departure.