Hi,
I'm a key worker for children with SEN, I love it and can see the benfits to the child.
To get considered for a statement at this age is unusual, it usualy happens when the gap widens and the child is about 5 - 6 yrs old. 15 hours before a statement is very good. It just means that your child can access learning better with the help of an adult key worker and wonte be held back by environmental factors that your child finds it hard to cope with.
Best of luck for the future.