My concerns were and are:
Will lower level items have lower power than currently?
Loss of flexibility.
Lack of high-end "carrots".
Unique effects are mostly meh.
What will happen to challenge gear and rune arms? Loss of masterful will hit these hard.
While there's a promise to look into lowlevel item power and runearms etc, and some of the clickies have been re-thought, there still remains flexibility loss, unique crafting effects that are underwhelming, and nothing to use the huge grind for once you start getting the level 35+ items you want.
I feel that cannith, as proposed, will be by far the lowest power of the three loot types, and that with a huge grind and resource cost.
I see this as a bad thing to happen to cannith crafting. We lose the good TR twink items and flexibility we have, and gain in return a large grind for some mediocre items that will only be interesting until we find something better.
I sincerely hope that you will find a way to add something unique to cannith that will make it worth it. As it stands, it's a nearly pointless use of dev time IMO.
You don't make such a large system change without planning for the longer term. That would be silly. So let's get it done right now, instead of relying on something that may or may not come later. With the time frames on revamps of systems, we may never see another update to Cannith crafting, so let's get it done right from the start.
I understand that I won't see top tier items from CC. I think this is a mistake (the availability of those could be limited by ingredients from raids, timers, and any number of other ways), but I think that CC should at the very least get something else instead to make the grind worth it, even in a couple of years.
My personal idea is consumables adding stacking bonuses to things such as hit, dmg, PRR, MRR, AC, MP, RP, spellpower. This would both add a reason to have crafting, even when the items start to be eclipsed by new and better named loot and a better supply of top end rand gen items, as well as make crafting something you continue to use after making the items you want.