Lets look at this from a realistic standpoint regarding skills, if I decide that I want to make a cotton tunic, I have the materials and the required "skills" then shouldn't I be able to use those skills when I see fit and not when random chance tells me I can.

I have no issue with being able to use the skills only once per synth that makes sense (well at least as far as balancing is concerned).

Vanguard's system for crafting was much more intuitive and required you to use multiple skills and tools to maintain equilibrium of progress and quality.

I think this game tried to copy Vanguards crafting system and fell massively short.