All it takes is one look at Pineda to see that the best thing he could do to enhance his performance is to drop fifty pounds. I am certain he is metabolically the opposite of, say, Gibson.
The reason the way they do it now is the right way is by the end of the season all teams have played a full season and you have the most complete estimation of a team's worth available. Yes there are fluctuations in each teams level of play during the season but there are too many variables dictating that level of play that would obscure an accurate assessment of their play. Huh?