1) With regards to crafting system:
The actual craft system can be basic stuff, and I've got thoughts that the larger the grade go the more it is going to stabalize. For a truth:
Currently tier 1to only two armor and system crafts need an item of a tier lower (which often can in turn always be found as decline in dungeons)
So lets suppose that with larger dungeons the decline rates of items is certain to get lower and lower to your point when it could be faster or safer to craft an item down the whole chain than to wish to get one while drop. Its a approximately typical thing for such a MMO. Cheap Riders of Icarus Gold
Add up to this the belief that its hard to have the best stats for ones class as in the meantime, meaning that if your first part is valid then later in theese "junk" goods wont be just sold to vendors but rather recrafted in hopes to get better stat with a higher level tier.
This way the system would need quite a bit of resourses pertaining to lowest tier object recrafting. https://www.oforu.com/
We have only but a smaller portion of the complete content, so things within this regard may be fair when they are ultimately.