I agree.
They won't really need the blue card anymore soon, resale restrictions create such a difference between direct and resale that no other incentive is needed.
If you buy Riviera direct, you buy in a Vacation Club, in your buy resale, you're buying one resort.
Resale buyers at the original resorts won't be able to book the
Disneyland hitel tower and maybe the new Poly building. And as time passes the difference will be bigger and bigger. 2042 will the a turning point.
The blue card will remain as a marketing tool as a way to sell upcharges, maybe as a gate to the AP discount, but it won't be the reason to buy direct anymore.
I cannot see many free Moonlight Magic events in our future.