Surely, if 'he is a large kid' is acceptable and 'he is a big child' is acceptable then so should be 'he is a large child' - or am I missing something?
How do you know..? Well, I've made a lot of reports and I very rarely get emails that they are accepted unless I comment, so I usually comment about it.
You can comment, especially if it's something that you want to clarify- this way we can discuss why something is not accepted, and you may sometimes persuade us to accept. But please report- it makes the contributors' work much easier.