＞These are earned by completing Veteran mode in each of those arenas and will have additional bonuses much like other Perfected sets.
＞Completing Maelstrom or Dragonstar Arena will now grant Blue versions of the non-perfected weapons from these arenas.

一行目のTheseが新装のPerfect版のことでVeteran modeクリアで手に入ると言っていて、
二行目各アリーナにVeteranの記述が無く、will now grant Bulue verとしてるので恐らくそうかと。>>325