Specifically with what we know about the system? Nothing the materia will have a huge boost with tier 5s and the carbon required for it. The AF pieces will be sought out and people will meld them up to get into the next tier of crafting. The scripts might have crafting materials inside them to remove the "poetics" materials so if those materials are required for the next crafting sets then comes the trade of time and difficulty. Also Is it possible to craft hq the new sets with out the script gear? But overall it is going to balance out more then battle will. But how drastic the changes are and what we will have to actually do for scripts capped/uncapped will really determine because people that are already omni crafters will level everything and choose the best 3 spec abilites to produce what they want.