I don't feel like crafting would add much to the BG3, since it'd mostly be mundane weapons you could otherwise just buy for most of the game. However, I'd love to see them expand crafting if we ever explore Chult or Maztica (I loved the NWN2 expansion that went to Chult, but the engine was definitely not equipped for that kind of survival open world. I feel like BG3's engine would be able to handle it much better with a bit of expanded options).
That's the trick with most crafting systems outside of the MMO genre: they either are pointless because all they do is giving you access to trivial shit that will easily be outmatched by pre-established loot
OR
they are too good and make all the rest of the notable loot feel like worthless, unrewarding crap in comparison.
Larian doesn't really have a good track record with the feature, either, since both DOS 1 and 2 were terrible for different reasons.
Personally (and this is a conversation that many of us here already had during Early Access) the only type of "crafting" I somewhat like and enjoy is the one that is mostly quest-related and built over the idea of collecting few rare (or unique) materials and bring them to an NPC to get an unique item.
Basically what was used in Baldur's Gate 2 and what we are already seeing glimpses of in BG3.