That would make sense IF the buildings were full. Right now, occupancy rates are rumored to be low at the deluxes and moderates (tm Parentsof4) so it doesn't seem to make sense to bulldoze a property with high occupancy rates and low overhead. In addition, discounts like free dining aren't offered at FW other than the cabins so basically people are paying $80 a night for a parking space and a bathroom.
While camping is charming and all, I wonder how many folks do it because they love the outdoors vs. it's the cheapest option to stay on-property. I wish I could tell those folks for almost half the price of a campsite that there is a really nice, clean, friendly Motel 6 that is right around the corner from the Studios. For the amount you save it will rent you a car, too.
Even if you spend 3 whole days at Universal there's still time for the mouse.
But do they have the $? Park tickets are getting really, really expensive. Just when I look at my own (now that AP's have been priced out of my range) it often makes me go, "Geesh, I might as well just fly to Disneyland if I'm going to spend this much on a trip," which is what I now have been doing. Particularly when you add park hopping, which I think is pretty much mandatory unless you are spending at least 7 days in the parks.
Since you can get 3 and 4 day Universal dual park tickets for under $200, most families need what, six or seven days of park admission if they are doing theme parks all week?
So let's say they split it up - a 3 and 4 day Disney ticket with park hopping costs $350-375. I've left tax out of both of these examples, so a 4 days at Disney breaks $400 with that included - that's a pretty big psychological barrier, particularly if you have a family of 4 or more.
A family of 4 can get 3-4 day Universal tickets for about $800. And if they want to do Disney, that's another $1400+. $2200 for a week's theme park admission? Before we've even talked about lodging, plane tickets, etc.?
The above examples are actually the most cost-effective ways, too - even if you drop park hopping from Disney (which with only 3-4 days seems like a waste unless you simply aren't into the parks much), that's still two grand for a family of 4 to spend a week doing Disney/Universal.
(BTW, the fact that Universal is so cheap is also why the whole "what if you have a one park ticket" criticism about HE is just a joke - folks will catch on quick that haven't yet - buying a one-day one-park Universal ticket at this point is about to be as rare as someone buying a one-day one-park ticket to a Disney park, it ain't 2003 anymore, or even 2013.)
Nah, folks aren't going to be splitting up. The new blood coming in, especially once that have been to Disney previously (say, 5 or 10 years ago) are much more likely to go to the place with the new stuff (Universal), maximize the tickets there (especially once they have an on-site water park), and then have 2-3 days to do other stuff in Orlando like Sea World, or maybe drive to the coast for the day, or sit around the pool.
The "per day" price savings ("the longer you play, the less you play") did wonders to get folks to extend their vacations when it was introduced, but what is going to happen now is what is going to bite it on the rear, which is - "Well, since we aren't going to spend a whole week there, a week's admission is practically the same price as we'd be paying for 3-4 days, so let's just relax the other days. We've been there before, we've already seen it all. Universal will be enough."