The idea that the Packers had no veteran options to sign this past off-season is ludicrous. Sure, only Hutchinson was the big name. But that's not what you need for this blocking scheme.
If the Packers management was prudent they would have signed some low-key veterans to keep the starting spots warm until the young guys were ready. But it's not very smart to go into a season with the intention of starting 2 rookie O-linemen.
Few rookie OLs have performed well in their first years. And the few that have had usually done so on a veteran offensive line that has several years of experience and have a certain pedigree. Particularly for guards, you need a steady rock at the center position.
The Packers don't have that, and starting 2 rookies besides Scott Wells is a recipe for disaster.
I'm going to name some names of veterans that were available that have experience in zone-blocking schemes. Sure, most of them are barely recognizable, but all present better options than a pair of rookie guards, one of whom has never played guard before in his life:
Trey Teague - starter in Denver and Buffalo at C and LT. Can play all 5 OL positions. Knows the blocking scheme well and could have easily pushed for a starting job at any of the interior spots.
Barry Stokes - utility backup for the Falcons in '05, starter for the Browns in previous years. Someone Jagz knew and could have easily filled in as a starter at LG or RG.
Jon Goodwin - played some zone blocking with the Jets, and could have pushed for a starting spot at C or G.
Bob Hallen - same as Goodwin, except a lot of experience in Chargers zone schemes.
Steve Neal - Pats don't exactly play the same scheme, but adapting one of their blockers to the scheme is not hard since they are similar. A tough run blcoker at RG.
Rex Tucker - knows the scheme from his days in St. Louis. A decent starter there and in Chicago.
To think that the Packers didn't have veteran option is naive. Although only Denver and Atlanta ran this specific scheme prior to this year, other teams like Indianapolis, New England, Chicago, San Diego, St. Louis, NY Jets, and Washington employed similar enough blocking schemes that skimming players from those teams would have been acceptable.