If you use it carefully, Builder's Workshop or other "cheating" things can help make your game more fun. I basically use it like this. I can only get an item if it's something that's consumable and I already gathered a good amount properly, or if it's something that I feel like I've "earned", like a rare drop that I made a good effort to try to get or a boss drop that never dropped after a few victories. Do that, and it helps speed up the slow parts of the game without defeating the challenge.
You can also use it to create amazing custom vanity sets for your character (as long as you're careful to never use them as non-vanity items).