And how would this be paid for?
Be careful what you wish for. Fast Passes are a finite resource. Every "preferencial treatment" Fast Pass means one fewer Fast Pass available under normal rules.
Disney has far more business justification to provide "preferencial treatment" Fast Pass benefits as an incentive to get potential guests to book $300-to-500-per-night rooms at deluxe resorts than to provide such benefits to those of us who have bought
DVC points over the past 15 years. And if Disney ever does so, it would hurt DVC members. Fortunately, Disney has been very fair in how Fast Passes are distributed, and I hope that will continue.
What would be Disney's business justification for providing reduced MYW tickets to DVC members? How would this increase Disney's profits?
I'm not saying that I wouldn't like to get discounts from Disney that aren't available to guests staying at other Disney and non-Disney properties, but I recognize that Disney is a business that needs to make smart business decisions.