You must have missed it. HK-51's gear is supposed to scale and was a feature up until a couple weeks ago. Apparently it is a known issue and is to be resolved. Hopefully sooner than later, the legacy unlock isn't worth the price otherwise.
Getting an extra companion from level 1 that is good at all crew skills?
So useless means don't have the right level gear? Half of my companions are "useless then" I'd consider having a full set of level 50 gear waiting a bonus. Non of my 50s companions do yet.
But thanks to this th missing phase of my plan is now obvious . . . it was:
1: Take Cybertech crafting skill
2: Create and stockpile massive amounts of droid parts
Thanks Bioware for providing 3 for me