~Post Big bang: +2 All Skills VS % Stat on a Helmet~

Yeah, but the boost only applied to skills that weren't maxed, unfortunately. On maxed skills, it did nothing, so it requires your skills to not be maxed in order for the +x All Skills effect to take place. At least, that's how it worked in KMST.

But we never had combat orders. It's fully possible that characters can only break the skill limit when given CO, where if you have +2 to all skills before CO, you'll have +4 above max level with CO.

That'd be pretty balanced imo. Combat orders on a hat is pretty over the top.