Jinpu was better than Enpi in era iirc, except for Enpi's more desirable SC location. Enpi's higher wsc (stat scaling) reflected on modern wiki pages comes from updates made to retail, they were both around 30% STR in era, and Jinpu was some goofy hybrid weapon skill like Blade: Chi etc. (which also sucks here from my experience) and some other WSs. In era Jinpu, Chi etc. wouldn't deal more damage to physically defensive targets than Enpi because the magic half of Jinpu was based on the melee damage the first two hits did iirc.
It's probably not set up right since it's an obscure weapon skill type that was never relevant beyond middle levels in era. SAM is easily one of the best positioned DD right now though, so it doesn't seem like a huge issue but it would be cool to see it eventually, so hopefully it gets noticed.
Y/G/K will always be inconsistent vs. high level targets because randomness, and I doubt most SAMs would be happy to hear why it's random vs. lower level targets too
