I am very glad to know you have thought of this. In past Maddens it often occurs that you have hardly any players on your team from the original roster after about 3 years because the draft pool tends to have much better players and at a cheaper price.
Another thing to consider is how the salaries relate to the talent level comparing the existing players and created players several years into the draft.
I can imagine this becomes fairly complicated as there a lot of variables you have to consider to make this work realistically, which I think is everyone's goal.
Thanks for getting back to me, it is really appreciated.