Birnbaum's Official Guide has a lot of the same things you mentioned, but then it is all a matter of taste and opinion.
As far as MGM, I did state at least 1/2 a day, note the word "at
least". I lot depends on how many shops and resteraunts one wants to visit, and of course the lines.
Again, having been as many times over the years, I do not recomend Universal or any other park on the first trip. Save those for your second or third trip. My wife and I always use the calender in Microsoft Outlook to fill out a tentative schedule, and go over it with the kids. We have done so since the kids have often compalined on the last day about not having enough time at the pool or to bike ride.
The schedule isn't written in stone, nor a lot of detail. We simply fill in which parks have early entry, and try to make it to that park on Early entery. We usually stay unitl after lunch, (by then the lines are long), and return to the resort for some relaxation or a swim, then return to the parks after dinner to see the fireworks or some of the ampitheater shows.
Everyone has their method of attack, you in time will find out yours.
I will add this opinion too. My family and I believe strongly that FW is the best way to see WDW. It is the best value package at WDW. We joined
DVC last year because we had been returning so many times it only made economic sense. Disney has been pushing the room (cabin) rates up 10% per year for the last 10 years running. Even tough we have bought DVC, we still plan on using some of our DVC points to spend a day or two in a cabin at FW. In fact, my boys insisit on it. They love the campfire program, renting a golf cart, and renting the water mice at the FW marina. The water area at BW is much smaller then 7 Seas Lagoon.
I am a little envious, as I have to wait until November for my next trip. AND of course your first trip is something magical !!!