Anyone who played FFXI will know that SE loves hiding secrets like this into the algorithms for us to figure out (ie: Elemental Wheel and direction playing a role in crafting in FFXI).
The elemental wheel wasn't a secret and direction was stated by the devs to have no effect.
There have been a few cases where people have said that one time they saw a Steady Handed touch that should have been 100% successful, but failed. But it's not clear if those were all from beta due to some bug, or lag, or just a very, very, very rare outcome.
And as of yet, I' haven't seen anyone be able to back that claim up with a screenshot. Not to be a jerk, but I'll believe it when I see it.
I get the feeling that the RNG is really streaky more than anything else. Sometimes, I hit every Hasty Touch and get a lot of Good procs for Tricks of the Trade to the point that it's overkill. Sometimes, I fail far too many SH2 Hasty Touches and get only one of zero Good procs to help offset it.
I agree with this completely. Not only does it seem streaky, it seems to be more heavily weighted towards the ends of the range.