It appears that control and craftsmanship now play a more significant role. I am assuming that SE is trying to say (in their silly not saying anything sort of way) Stop crafting in your skivvies.
I started having issues where one leve (same exact craft) I succeeded every craft, another leve, I failed 3 out of 4 times. I even did 1 synth from the failed leve to start, then switched to the other (which I then succeeded every time with), then switched back tot he other one, failed, succeeded (by 2 durability) and then failed again (with 7% progress).
The way that I was failing appears to be control related. Craftsmanship appears (this is based off of ~500 synths) to influence increase in quality and decrease in durability. Control seems to influence success over failure.
The other thing I noticed was that after the open beta durability loss was increased (from ~20 to ~30 for standard, ~30 to ~50 for rapid, and ~30 to ~70 for Bold, bold may be higher, but I have never lost more than 67 durability on a stable synth... Unstable synths do not appear to have a limit to their durability loss).
Yesterday (and this was only with ~20 synths) the amount of loss did not seem to increase (I was still getting 20-30 for my standard ceiling, and I got 45 once on a bold), what did increase is the chance of failure, and the amount of progress and quality gained in a failure. Even with Tender Touch, I could lose ~15 durability, but I would gain zero progress or quality. I never had so many failures that resulted in zero progress gain in a row.
The above mentioned Hora synth, I literally lost 67 durability in 3 standard synth attempts (15, 25, 27), and gained exactly 2% progress. Very frustrating, however, I know that I don't have good crafting gear (though I got the hora synth as a lvl 10, and I am lvl 10).
I had assumed that synth support would give me enough control and craftsmanship, however, yeah, no. I probably should have tried guild level support rather than basic (I was at a repair person).
Anyways, I am going to try and get my three remaining peices of synth gear tonight and try again (if I can), and will try and post my findings, however, based on how the failures are happening, I am quite sure everyone who doesn't notice a difference is wearing synth gear, and people who do not see the difference are not (and are probably not wearing any gear).