Jahuu
Generic HA and dagger could be a bit too over powered, but easier recipes means less to remember too.
To my mind, having all 6 HA craft skills at 250 is enough of of an investment to deserve a little bump. As for daggers, it takes a bit to get all four Weapon Craft 25 actions, so the same logic applies if you take combining the best qualities of each race's weapon crafting skills as a prerequisite for crafting THE best dagger. Sure, a dedicated crafter has plenty of "extra" points to spend, but the key word there is "dedicated". It's still a higher bar than other generic plans which require merely doing 4-5 certain missions, and I feel that that higher bar is enough to justify something a little more powerful.
That said, the idea of Marauder-exclusives is kind of appealing. After all, who knows more about combat than those who belive that might makes right? If generic daggers and HA really are OP then it stands to reason that it'd take a wide range of experience to make the "ultimate" OP gear. If that wide range includes spending time as a KoS outcast where one must fight hard merely to survive in a world that despises you, I can see how that would justif being able to learn more about weapons and armor than those who are accepted by society at large.
It really depends on how high you want to set the bar for deserving the right to craft such gear (in other words, how OP you feel they really are). IMO, a generic HA plan would be less OP than the NPC HA, but daggers and amps are debatable.
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Do not assume that you speak for all just because you are the loudest voice; there are many who disagree that simply have no desire to waste words on you.