Just picking up on this. The DLH is not a 'luxury' property, like a very high end brand hotel, but certainly stands comparison with a Westin. I'm sure you have looked already, but there plenty of hotel walkthroughs on line that show what the rooms are like. My kids enjoyed the Disney atmosphere even as teenagers. It was sort of nostalgic for them.
It will have plenty of small kids around, especially in the pool area.
That said, it's still a very nicely appointed hotel. Its greatest 'luxury' is its proximity to the parks, and as others have said, the 'bubble feel'. The pool area works fine for adults and kids. In some ways it might be less annoying to have kids at the DLH pool than at the Westin. There will be kids in both places, but only one has a monorail to distract them
As for breakfast, can I just put in a plug for room service? We have been staying at the GCH recently, so can't be as definite about the DLH service, but it has been faultless and on time every time for us. We come from a different time zone , so getting up can be a challenge - room service makes it easy. We tend to split the orders (the servings are huge).
If cost is no option then the GCH wins every time. It has a less frenetic pool area, and of course is luxuriously close to the parks.
And the half hour a day early entry is also a little luxury that can't be matched.