Legacy gear does grow with you because its power is determined by the armoring and mods inside it, So far the only set that was released has been the Sand Person Blood set which is pretty ugly, but epic in the fact you can use it on any character and share between classes and companions ex: Marauder/Juggernaught or Jedi with Sith or Healer Companion with your Operative/Smuggler. We need more of these kinds of gear, really disappointed only one set has been released so far... The potential is just awesome.