Some basic crafting options wouldnt hurt the game to give some builds more options with all the gems iggots infernal ore and other things that drop that could be used to craft a few blue and purple aka rare and very rare options would not hurt for act 2/3. There are indications that some things were already mean as craftables or upgradeable craftable items and that it was never added to the game.
Some things were also removed from beta as well such as belts which have long been a core part of dnd.
Making suggestions being able to get more mithral ore and fully utilize the forge in act one before the end of act 2 would be nice. Some items lack options later in the game such as sickles, Battle Axes, Long Swords (1 very rare), Warhammers, Morning Stars, there are some items your more or less niched into using and there are some cool items that are really kind of useless when you get them and end up unexplored. On the other end there are lots of ways this could be improved. But this doesnt mean like crafting should go crazy or that we need a plathora of overpowered items just item options would be nice to flesh out some builds. For example a scimitar that allowed you to make the same number of attacks with your off hand when attacking with your off hand as you have extra attacks this creates a DW build option maybe with a simple +2 to the scimitar.
Maybe a craftable pair of boots with a +1 ac and +3 m movement or a +2 War Axe with +1d6 fire damage when wielded by a dwarf the character gets a +1 to ac. A staff that grants a wizard +3 points of arcane recovery and lets them add there intelligence modifier to damage from evocation spells. while not insanely powerful when looking at those items being able to craft items like this in chapter 2 creates some build versitility. Another example might be being able to make a ring adds +2 thunder damage instead of the +2 acid damage from the 1 ring already in game or +2 lightning damage. You could get craft a ring adds 1 more missle to your magic missles and builds a magic missle based wizard using 2 rings + necklace to basically go missle crazy. There are lots of small things like this could create some interesting and creative builds that still wouldnt make the game to super over tuned but it would create some build options.
Id also like to see them add a feature to multiplayer letting every character in a multiplayer game get some unique option such as the hags hair or the potion of +2 str in chapter 2 but it could only be used once per character.