Will something change? yes. Will it be extreme? Maybe. But paving over SSL? If it isn't there...the gators move, they just don't go poof. I don't think there is one resort on property that doesn't have body of water with a gator in it (rides don't count).
This morning the news said that in the 60/70s there were about 1,000 gators in FL. Today there are over 1.5 million! As I type this now I see one 25 yards from my office parking lot. On my way home I will 1 or 2 more in the man made drainage ponds in my neighborhood. I have had them under my car, in my back yard, at my front door. I don't live near a natural lake and don't live on water...they walk!
If you don't have "man made" bodies of water WDW would be underwater every time it rains. Disney doesn't spend all that money building lakes, rivers, ponds because they are pretty it is because they are required, serve a purpose and allow WDW to exist.