Statistically, Disney, on average, knows how long we spend at WDW each year, how many stay in our rooms and villas, how many days we spend in Disney Theme Parks, water parks and other WDW venues and how much we spend per day.
While they probably don't track individual spending/admission habits, they have a very clear idea of what we collectively do while at WDW.
As long as those numbers remain within their expectations and comfort level, we are not likely to see any change in the discounts offered to try to get us behave differently.
While there are some (possibly many) who are spending less time in Disney venues (and are spending more time and money offsite), until those numbers show up as a statstical change we won't likely see any increased incentives.
Personally, I also get about 50 days of Disney admission from an AP, which makes the value of the renewal discount a no-brainer. Discounts on accommodations have no appeal for me as a
DVC member and the other AP "incentives" are usually duplicated with DVC membership. The admission savings alone is enough incentive for me. When we have guests with us, the UPH with 10% discount usually provides the best savings for their needs. Sure, other discounted options would be appreciated, but I've yet to see the compelling business reason for such a decision. A few anecdotal posts on this board don't serve to change the statistics already known by Disney.
As for visiting USF/IOA/Sea World/Busch Gardens/etc., they are certainly nice options and each has it's own following. Some find the "value" of those parks versus the admission cost to be more favorable than the "value" versus cost for Disney venues to determine how/where they will spend their vacation dollars. I understand completely. In my case, the "value" of the Disney venues far overshadows the other options and I'll continue to enjoy purchasing AP's and staying onsite using DVC accommodations.
DVC has allowed me to have, IMO, superior onsite accommodations at a reasonable value. The fact that I also enjoy the Disney Theme Parks more than the other local options is just icing on the cake.
Your mileage may vary.