Sensuki
Arcane
It's not necessarily a bad thing. The IE games limited the creation of artifacts through their placement in the game world. You couldn't create The Equalizer until you came out of the Underdark for Chapter 6.
Project Eternity will probably be a bit more like BG1 (or dare I say, Dragon Age) where you can go pretty much anywhere in the world and find the ingredients for powerful items relatively quickly if you knew where to look (subject to difficult of areas). The restrictions based on char builds etc is just an easier way to monitor the progression and amount of items that can be made on one playthrough.
(or perhaps force you to pay for a vendor to create the items that you can't make yourself)
Project Eternity will probably be a bit more like BG1 (or dare I say, Dragon Age) where you can go pretty much anywhere in the world and find the ingredients for powerful items relatively quickly if you knew where to look (subject to difficult of areas). The restrictions based on char builds etc is just an easier way to monitor the progression and amount of items that can be made on one playthrough.
(or perhaps force you to pay for a vendor to create the items that you can't make yourself)