The latest update has a L (of L*a*b*) ramp very close to linear, which speaks pretty well of it.
Comparing it with Arachne's version, it's much more evenly distributed; Arachne's has pairs of colors of very similar intensity.. which does boost contrast overall, but I believe for a palette this size you can't afford to spend slots on colors that just look muddy when mixed.
Helm, the latest palette doesn't have that problem as severely; you can get some depth from it. (although the other grey's gone -- but IMO that improved your sprite's look.)