Your biggest advantage will be going EARLY on your second day. We just got back and did a TON with little or no waiting. First decide which park has more "headliners" that you want to ride, and go there first thing on your early day. Here's what we did on our early DCA day using MaxPass...
Park opened at 8; we were in line at 7:45
As soon as we crossed into the park we got on MaxPass and made a FP for Radiator Springs Racers
Then we walked to Soarin (near the entrance) and walked on.
Next we walked to CarsLand and walked on the Luigi and Mater ride. Then it was time for our FP to RSR, and it wasn't even 9:00.
When we got off RSR we got on the app and made FPs for Guardians of the Galaxy.
We shopped, rode everything in Bugs Land, then went to G of G.
After G of G we got FP's for Toy Story. Unfortunately before we got over there the ride went down. But... that meant we had a "free" FP for anything we wanted, so we rode Grizzly River Run, again with no wait.
Don't waste the first two hours on anything you can do later! Avoid the temptation to shop, eat, or see shows during that prime time; you really can ride more in the first two hours than you can the rest of the day.
By 10:30 we had done all the big things we wanted to do. That left time for the less crowded things later, an afternoon break, nighttime parades, etc.!!
If you'd rather go early to DL, you can do something similar. When you cross into the park, FP something big (Space Mtn. comes to mind) then ride all you can first thing!
We found the Max Pass COMPLETELY worth the money.
As an aside, since you visit WDW often, focus on the stuff you don't find in Florida: Radiator Springs / Carsland, Guardians of the Galaxy, Indiana Jones, Matterhorn. Then move on to the things that (I think) DLR does better than WDW: Pirates, Small World, Space Mountain. Of course there are more, but that's a start.
Have fun!!