I would say most of the perks for florida residents are designed for people living in Orlando and the surrounding area, that would go to the parks or restaurants on a regular basis, weekly or monthly if you may. That is what is behind the epcot after 4 and water parks after 2 passes, not to mention the Seosanal APs.
I'm sure that if I were living in Orlando with my two little daugthers I wouldn't doubt to have mommy and me meetings in the Magic Kingdom instead of a local park

, or going for dinner at epcot on a school day just because we can.
Of course, the rest of florida benefit from these discounts, which I'm happy for, since we live in Miami (although we are in Spain for one more year on job assignment).
They have similar discounts on the other parks for the residents of the area, like in
disneyland CA and paris, although I have to admit FL resident get the best deals.
Does disney have an interest in lurking DVC members to the parks after 2 or 4? Well, we would need to see the statistics on what DVC members do when they are in Orlando. Do they go to other parks or other Orlando attractions or do they spend most of the time on property? I'm inclined to think most DVC Members already spend most of their time on property, so I wouldn't see the need for Disney to lure them any more. But, if Disney realized that the mayority of their DVC visitors are going places, eating and enyoing Orlando out of Lake Buena Vista, well, then you will start seeing those perks flying in.