That's what so great about the CA parks compared to the FL parks--everything is right there in one place. Yes DL has more attractions and better ambience than DCA but I find myself focusing on the top tier attractions and doing them as many times as possible as opposed to hitting all the attractions. DCA has just as many top tier attractions as DL and they are arguably better. 

I think these opinions are more relevant when you have teenaged or adult kids. With kids as young as yours you may want to spend the two full days at DL seeing all it has to offer.