I will say that with such low chances of success, Hasty Touch, Rapid Synthesis, and Patient Touch are effectively useless as far as I am concerned.

I will not use skills with such a huge chance of failure. If SE intends those skills to be the only way to accomplish high end HQ crafting, it will effectively push me out of the crafting scene. With that said, that might not be SE's intention. They may simply expect that proc based skills like Tricks of the Trade, Focused Touch and Focused Synthesis play a bigger role in high end HQ crafting and thus limit how much impact macros can be used for such.

But as they are, 50% or 60% chance skills are dead on arrival in my opinion.