Every few years the system seems to get changed, mainly for the better but some always loose out. So the 'inicative results' you've just had helps the majority have less stress but gives the 'passed but not yet in' just as much, if not more uncertainity than before. I was there last year!
The only answer is a fully comp system which may well not help most grammar children. I know about that as well as my school turned from grammar to comp at the end of my 3rd year- but we were kept fully streamed in our old classes with most of the same teachers.
Or we could go back to the old system where there are far more Grammar schools and the top 25% or so of all kids go to them. In a recent reading test - (Suffolk scale which tests words in context, not just word barking) - my son scored a reading age of 16 and a predicted SATs score of level 5A+. It puts him in the 98th centile. Who are these kids that are brighter!!! I am pretty sure that in my day of Grammar eduacation, he would have been in there easily.