They aren't taking away the BBJ - it's just remaining a static amount. What that starting amount will be, I don't know (it's $182k as of 4pm EST today). But the formula for the BBJ kicks back 30% to keep it going. Since it's not hit all that often, as I understand it, it's still going to remain for some time. It just won't escalate from added rake - which is all funneling into the Beast now.
Any promotion relating to accumulating points or rake is going to favor the mass tablers, though. Unless a system is devised that factors amount of hands at a percentage in the formula (like, for instance - 100k hands = 20% of the calc), it will always be that way.
I don't understand the EV argument - players should know by playing at a jackpot table that their added rake goes towards a promotional leaderboard. If they have no desire or temerity to reach the playthrough needed to place on the leaderboard, and no desire to hit a de-escalating BBJ, why play on the jackpot table at all? Stick to the non-jackpot tables and you're excluded from any of this. Ignorance of what the purple tables are shouldn't be an excuse.