To help with the questions and to get everything back into one place, here is a consolidation thread with some additional info. On a big system like this, not all information will be available yet as we are discussing the system while the work is ongoing.
Cannith Crafting Recipe Experience
The 50% success mark will now be 15 levels below the recipe as opposed to the 10 levels it is currently.
To go along with that, players will now be able to craft recipes they have at least 1% chance of success, instead of being limited to 50% and above.
These two changes should allow a bit more flexibility in what they are trying to craft.
Trinkets
The current plan for trinkets is to allow any of the non-damaging scaling effects to take the place of the Prefix and Suffix. Any of the non-damaging insightful scaling effects can go into the Extra slot. It is still being decided on what special (non-scaling effects will go on trinkets and where)
Runearms
Don't have further information on this time, addressing that here as I know it will be a question. Information will be provided as we get to further direction on that point. It is mainly a matter of decided how to adjust the runearms to work with the new system and which effects they will get to craft.
Flex Shards
The plan is to not launch with flex shards. We think there is a good balance that can be found between Random, Named, Crafted loot and flex shards will knock some of that out of the way. The Cannith system will be a bit different from before and some of the power and versatility is tough to see without getting your hands on the system.
Artificer/Mark of Making bonuses
These will still apply as they do currently and players are still restricted to the level cap (so these abilities will not push a character above the 400 level mark)
Other Things (not directly Cannith, but do affect Cannith)
DR breakers
We are looking into adding DR breaking into good/evil/etc. That would be a retroactive change that would most likely take effect on existing items as well as items going forward, same would apply to the effects from Cannith. When this is added back in, the negative level for using alignment based DR breakers you don't match with will also be added back in.
Attributes
There has been talk about attributes being too low at lower levels. That is a scale that we can look at and tinker with, which would also change items that exist with these scaling effects and would change what came out of Cannith crafting as well.
And as always, anything and everything is subject to change for any number of reasons.