LF has no value below 2 weeks. Each day is diferent, and you should wait at leas 2 game weeks before taking a decision. Before, your feedback is not accurate enough.
And you shall also be careful about how the line behaves. If, suddenly, you have 96%LF, look at the line detail. Maybe one of your planes is in CCheck(it will be written). Maybe one plane of the opposition is in CCheck(and his market share is suddenly zero). In that cases, wait.