Boy, I have a completely different take. My kids are 38" and 41", they are 2.5 and 5 years old. We had a good time at the park but it is not a park that one adult can take 2 small kids to. Most rides required kids under 48 inches had to ride with an adult and in all cases there was only room for 2 in each car, so that left me with one kid that couldn't ride unless I found an additional adult, which I managed to do a few times.
Imagine walking up to a complete stranger that appeared to have one kid and 2 parents and asking if the "extra" parent would please ride with your kid. For a park, that is marketed for younger kids, I expected things to be easier than they were. Once a ride operator rode with my extra kid. There are no infants allowed on any of the rides and there were several with age requirements, my 2 year old met the hight but not age several times.
My kids had a good time. They spent about an hour in the ball room. They loved the lazer shooting ride. We didn't have the issue with lines because it wasn't too busy, but I can see how it could be a huge problem. The rides load sooo slow. This is a nice park on a good weather day but I would think it would be hot on a warm day and there were not many places to get out of the rain.
The competition in the area is stiff and I'm not sure that Legoland will get more of our vacation money just because for the same price you can get, what for us, feels like more at some of the other area parks.