Heya guys. I've got a question for you all.

I've heard and even asked why the soulknife isn't that good of a class, and well, I have my answer and understand why. My question is thus: would it be overpowering to allow the soulknife to, instead of creating a blade from the mind, simply empowering a blade to float beside him? It would have rules for saving against that sword's destruction (like if it breaks roll 1d20 + will/int or something like that + 1/2 the sword's bonuses to try and reform it if it breaks), how far the blade could extend, any bonuses that could be placed upon the blade (and perhaps another check to put more bonuses on a blade that already has bonuses).

Would that render the class overpowered, or would it actually balance it?

Just a note: I'm not much of a homebrewer. Math & ratios & spells and whatnot is hard to do, and making classes interesting and unique is, well, difficult.