I have two main problems with crafting. One I think will be partly solved when the game launches and there's guilds/players working together, the other one is an actual annoyance.
1. Crafting takes a vast amount of materials. The amount of time it takes to kill/harvest mobs and find/harvest ore and then craft the various components and parts is a couple hours worth, just for a single intermediate armor piece. Or you could go kill 2 or 3 <insert mob here> and get slightly lucky. Maybe 10 if you're unlucky. And get a comparable item with admittedly, lower durability. Because I don't yet know what later levels would be like, I'm assuming that with guild/community cooperation this isn't as bad. Now that I've been able to spec more into the crafting discipline, mats do come faster, but still not as fast as actually killing mobs.
2. Crafting is more tedious than it needs to be. It's window switching/manual reading: the game. If I want to craft a sword, I get that it should be 3 items (Pommel, hilt, blade.) That's fine. But when each of those is in a separate list for some reason, it's needlessly tedious. My suggestion is that next to each item slot, a "+" sign or similar be added that opens a sub window where you can craft the needed item. That way you still have the crafting menus available, but you don't have to go back 4 tiers in order to find out you need more metal to make rivets.
3. An item material tree being visible for crafted items would be nice too. This would provide a rough overview of the rough total of materials needed, not counting experimentation. Ideally this would be clickable/link to the various points as well.
For example: Click a special symbol to see the full crafting tree. (The following item combos/numbers are made up)
->>3 Sewn Leather Squares