It's not really the quality of the weld, but the placement of the items being welded that resulted in the deck lid items not being placed correctly BEFORE they were welded. From what I understand, a segmented weld will deform the items being welded less as there is less total heat involved, which might be why a "tack" is done with the rest being brazed-in with an appropriate material for body panels? All of those functions would have been done prior to the anti-corrosion "bath" the body went through. FWIW
Understand, too, that the "factory people" know (through destructive testing and such) just how much and little "weld" is needed in particular areas. Segments of welds can result in a stronger, more durable situation than a solid weld that looks better to most of us. With body panels being more prone to deform from the added heat than the thicker stub frame channels.
Of course, when the pictured body panel welds are re-done in the restoration process, I highly suspect that they will be done more slowly and lovingly than an assembler might have time to take with them. Plus the addition of some anti-corrosion compound to the backside of the repaired area! As no "line speed" issues are operative in getting things done. In any restoration process, there are many items which should be duplicated (as in inspection marks, paint daubs, etc.), but fixing some of the factory mis-steps can just be a part of the whole "make it right/better" situation.
Enjoy!
CBODY67