The school I used to work in gave NC levels for all years, progress during the year and targets, in addition to detailed comments. My DD's reports gives no levels at all or effort grades, but a written report for each subject. I prefer the report without grades. DD's is lovely and very positive and I am not distracted by thinking she's only level whatever and that's average or below etc. Mind you I couldn't give a monkey's what level she is at, I know she needs to read more and that will have far more effect on her future achievements.
It just says Excellent progress, working above national average but that could mean nothing much.
That tells me quite a lot. Your child works well, has made more than a year's progress and is a high achiever.