Rogue SoulKnife

Hey! I just was checking the subclasses and saw this one, Rogue: The Soulknife

It was looking pretty interesting, you can create Psychic Blades and telepathically and pretty fancy things, until i search a little bit of info, and a lot of people say is a shitty subclass, there's any way to make this usefull? Cause, on the paper it doesn't seems that bad and looks cool, but im afraid to start a campaing and doesn't have fun with this subclass.