I've said it before but I really don't think their concern is to separate 14 from the away fans. They are miles apart anyway. I suspect they have a paranoid desire to keep boisterous 14 away from the (occasional, perhaps naive?) home fans they are now allowing into 11 and 12. That would also explain why they weren't offering chlld tickets in 11 and 12? It's the only explanation I can think of, but if true they seem very coy in admitting it.
(Most people in 15 & 16 are likely fully aware of noisy corner, and have positively chosen to be near it).
It's time SAG and the club started treating the people in 14 as valued paying customers rather than a 'problem', and they might find the stewarding actually gets easier. To that end I was glad recently to hear they are looking at safe standing in the corner.