Unfrotunately write ups will make or break your SJAR.
You can have the best SJAR in the world, but if your ROs aren't able to articulate how good you are, then I am afraid you're at an immediate disadvantage on the board, and someone else who is maybe not as good as you; but has an RO with a better grasp of English, will most likely come out ahead.
I haven't bothered asking for my position. I'd rather not know personally.
That is the problem with our promotion system it is the 1st/2nd RO that is getting assessed on his/her writing/English skills and not the subject.