Craftsmanship suggestions only influence skills like Careful Synthesis. Control influences if you get quality to 100% or not. As Caimie pointed out, crafting something above your level will have much higher effect on both craftsmanship and control requirements. Once you get in to Master recipe stuff with stars, suggested becomes required and the 'required' won't be near enough because there is an invisible level curve.
In your case, 53 doing a 53 recipe the suggested Craftsmanship means a safe completion, leaving lots of opportunity to reach 100% quality. tl;dr you would have completed the durability in 1 less step with suggested, leaving you one more quality step for an inner quiet stack, you might have gotten 100% instead of 71%