Well thank you for that. It's a lot to digest and over multiple readings.
I've been following a few videos that mainly show people crafting these due to luck. Lots of ".. and now if could just get a... YEAH centered there you go"'s.

You mentioned " one may succeed in doing these Expert Recipes while the other may fail miserably" well I fall into that latter category. Our stats are nearly identical except for the FC buff.
The opening synth phase is easy enough - it either works or it doesn't, due to bad RNG but at least you find out earlier rather than later to just hit the Quit button.

Its the quality phase I'm having a devil of a time with.. but that's nothing new with me I've hated Expert Recipes since they first debuted and that hasn't changed one bit.
I'm on a mission this time to get this figured out.