Adding a combine-type event in which teams get to select players to workout with and players are graded? Or possibly a senior bowl game where some of the best players play in a rookie-game? Or maybe draft/prospect stories released throughout the season? I know these would be really hard to create, but I think that more scouting opportunities for rookies would be really cool! Would adding a pro-bowl game in which the leagues top performers compete against each other be hard? These are all just ideas that need a lot of work.
Heck i would love to take this a step farther and sim college games for us to scout plus what you described above. We have a limited amount of scouting $$ to use(determined by franchise profit/loss) to scout with.
And of course that could be a window into a future college segment of this game. Which would be too kool for school.