True, but again, if that was your starting running back, and I mean a scatback with 90+ speed and acc but like 40 trucking, you shouldn't have it set to power back in the first place.
I just meant that like almost every team out there, I keep a speed back and a power back. If you have it set to speed, the power guy's pot is lower, and vice versa. However, I play all the games, not sim them - me and the OC tend to split playcalling. When my philo is set to power back and my speed guy is a 56 pot...he still busts off long td runs, makes great catches in the field, etc. I know that as a power back, my 170 pound speedster isn't ever going to be able to have a high potential, but it doesn't change his effectiveness. My playbook has lots of power runs, but again, the back won't be in the game much as my 3rd back, so even if the OC wants to call HB dive all day, it won't affect things. If I want my scatback to carry the ball, I'll step in and call a pitch or a screen or something. And the philosophy section has a spot for power running, west coast, blitz heavy, etc that affects playcalling - not the players philosophy.
I can see what you're saying if you just sim all the games, I just never have done it.
And to echo Yatch's comment, you can pretty much do anything if you have the right coaches and gameplan and stick to it.
The key is find a system you want to use, find the players to fit that system, develop and stick to your system. Enjoy Championships.