I think the logic of dynamic award pricing is not to present 2 alternatives with different pricing for the traveller to choose from (and thus steer awards to certain flights). It is to present people with the choice between no awards and more expensive awards.

"Yes, longhaul J award is 160k and we release one seat every second leap year when full moon falls on a thursday. But we also release award seats on almost every flight with a slightly (≈2x) higher pricing".

Kind of a "points-and-cash" system, but with a "points-and-some-more-points" pricing.