No matter why you're missing your fueling targets, this method would "fix" it. However, if the real problem is that your injector scaling is off, changing the MAF scaling wouldn't "fix" it so much as "patch" it. In other words, your fueling targets would be dead on, but your load would be off because you fixed an injector scaling error by dicking with MAF scaling. It's always better to truly fix the problem than patch it over.
One way to tell would be to do the logging and analysis. When you get the numbers back, if your error at each MAFv are exactly the same amount in the same direction, you probably don't have your injector scaling dialed in perfectly. However, if the error wobbles up and down, or is negative in some places and positive in others, it's a MAF scaling issue. Another way to think of it is that if you're looking at the red and blue lines in the final graph, injector scaling can move the lines up and down, but not change their shape at all whereas MAF scaling can move the lines up and down AND change their shape.