That would definitely work. Perhaps +1 at 6th level, +2 at 11th level, and +3 at 17th level? I think that's about in line with the recommended magic items you'd get at those levels, though I may be wrong about that.
Fair enough, I can't honestly argue there.
"There's too many men, too many people, making too many problems..."
Well, Mystical Recovery and Strength of Mind are certainly overpowered. Beyond that, though, I wouldn't say the latest version is too bad. Though, some of the benefits from the disciplines are just stupid. Third Eye's Psychic Focus feature, for example