The basic design of the GC's are pretty much the same from the 1-6 with just cosmetic changes and design upgrades. If rebuilt with today's advances in designs, any GC can be built to maximize the play of the table to match the play of any other top tier tables of today. Maximum playability of a pool table needs a basic foundation to start with, then rebuilt upon that structure.
All pool tables use cushions, rail bolts, slate, pockets, and a frame design....with the frame design being the deciding factor as to how well the table can be built to play.
The looks of a table, such as the Anniversary, Centennial, GC's, are just that, the looks, but all of those I mentioned are built the same, one is not better than the other when it comes down to playability, that's just a public perception that one plays better than the other.
But I'll say this, the rebuilding of any table is limited by the knowledge of whos doing the work!!
I don't know of anyone that is constantly looking to improve on how tables are worked on. Example of that is take a 3 piece slate table. Everyone, including Mark Gregory still uses all the slate screws to mount the slates to the frame of the tables, if they knew what I do, they'd stop doing that. I just mounted the slates on a 5'×10' Regina 1912 3C billiards table, only using 4 slate screws as dowels to keep the slates from being able to move around, no slate screws were used to match the seams at all.
But, I'm a different kind of table mechanic I guess.