I usually see carps weavers and tanners sp'ing off really unreasonably high level synths which may be the real problem. Like 400-600 a synth. You can't do that in other crafts. On GS and BS, you can expect instability on 75% of synths on a skillup that's R40+ unless it gives you under 260 sp. That's just how it is. Instabilities become very common on high-level grinding synths. Our sweetspot for reliability and SP gain is at about 310 sp per synth, because you COUNT on instability happening and pushing through it.

I don't see a problem with skillup reliability. Only problems I see in crafting are that HQ materials aren't given the power and respect they deserve, and that there's no PvE or party content for it.