Larger incoming fall is meaningful data. Even if it lacking QC. Certainly for deciding between otherwise equal schools. It is just another piece of the puzzle in making a decision.
But if I'm the only LHP among 20 RHPs showing up, it doesn't matter if it's the spring or fall roster. I like my chances. How you use the data depends on your circumstances.
Going forward Spring rosters are corrupted because there is no consistent way of listing class due to COVID. Doesn't mean we should stop looking at spring rosters. We take the best data we can get and use it for guidance.