While I appreciate the comments Jim, I am at a loss as to why you would find the phrase "revelation knowledge" to be unscriptural when I quoted this passage in my post that speaks of just that:
That the God of our Lord Jesus Christ, the Father of glory, may give unto you the spirit of wisdom and revelation in the knowledge of him: The eyes of your understanding being enlightened; that ye may know what is the hope of his calling, and what the riches of the glory of his inheritance in the saints. (Eph. 1)
Nonetheless, if you still do not believe that the above passage is enough to support the use of such a phrase then may I remind you that such words as "Trinity," "Sunday School," and numerous other phrases used among Christians have even less support in Scripture than the phrase "revelation knowledge."
Furthermore, the "baggage" came from the critics of the faith movement. It is not the fault of the faith teachers that a simple phrase was TWISTED and made to sound esoteric and gnostic by the critics of the faith movement. Should everyone change their lingo every time someone expresses a distaste for it?