I have owned DVC (BWV and BLT) since 2003. I'm not sure what perks you think we get but they sure aren't a big deal. The only real perk we get is the ability to buy an AP for less than you can buy it for. It's about $125 or so. We used to get free valet parking, but that's gone. We used to get free wifi, but everyone gets it now. We used to be the only ones to hear 'Welcome Home' but now everyone hears it.
Believe me.....our perks aren't 'all that and a bag of chips'. I pay about $1500 a year in dues. If I stay a total of 10 nights, that breaks down to $150 a night, which would be a moderate at the cheaper end. But, I get a nicer resort for my money. Of course that doesn't include my initial costs of purchase. For me, it has taken about 10 years for me to get to the break even point. But even now, I still pay those dues every year. Is it worth the break I get in APs? Probably not. If I didn't own DVC, I wouldn't need an AP.
Believe me, DVC doesn't lock me down at all. Sure, I have to plan my trips a year out, but even if I plan 6 months out, I can still find someplace DVC to stay. Maybe not during Food and Wine time, or other equally busy times. But, it's just not an issue for me. Are you sure you understand how DVC works?
All in all...we really don't get that many perks. We tend to feel pretty under appreciated by Disney!