Explains my thinking exactly. Why else did we ignore JVR and make Bauer go down back at VFL level, even when he was kicking goals in VFL matches? Of course, to train him up for being another tall down there with Tarrant's demise. Along with Tylar Young, whom we upgraded from there last year. Grimesy might be finished after renewed 2 year contract. So we have forward planned our future defensive structure, if Bauer or Biggy or both (even better) can step up. But Balta is the cornerstone it's built around, just as Rance was in our glory years. That's why I think it unlikely to see Noah being pushed forward or even into the ruck, unless in-game injuries or match situation is really desperate. But trade Noah? No way.
Gibcus is a lighter body than NB but will fill out. He is most likely more nimble and agile than Noah. An even better aerialist, especially when he develops his body size and strength, putting on the muscle as he has started to do. Certainly a very good and long kick. Reads the game well and makes good decisions generally. And, as far as I know, no eyesight issues like NB!