UmmBerto...I see your point, but I "believe" the answer is you are comparing Madden and its ratings based program to Sandbox and its stats based program. In some positions it would happen just as you stated. If you put an OL into TE, you would likely get exactly as you described. That OL likely has zero receptions, but a whole lot of blocking information. He would perform well in blocking but not get you a whole lot of receptions. He would not have a "speed" rating (in madden you might have an OL with 50 sp and a TE with 70 speed...this would create the disparity along with catch rating...Sandbox doesn't have these ratings). For closely related positions like DE/DT, the "important" stats for the position would be similar and so they should crossover more closely. The penalty would account for ability changes. For example a DT would not make a good LB while using similar performance stats: tackles and sacks. So a penalty would make up for the stats relationship for the positions and the ability difference.