I'm working on the assumption that some shards will be harder to make after the change than they are now, or will be removed. (For instance, I don't see Construct Fortification, Blood, or Blood Rage on the http://ddowiki.com/page/Talk:Cannith_Crafting/U32 list.
If I want any items with these abilities, I'd better make them now.
Can anyone tell us which shards will be effectively higher level, and or use rarer collectibles, after the change? And which shards will no longer be possible?