I think from a game-design perspective, the worry is... once you make it possible/easy to ship out your last-year-of-contract good players for high draft picks (thinking "hey, you know, it happens... Von Miller... you know...") then jerks like me will basically just exploit the hell out of it and my team will do this trade three times a year and stack up first rounders like no NFL team has ever dreamed of.
I think for a game without any difficulty sliders/settings (at least not any longer, it once did) it's a real challenge to manage stuff like this. FOF ended up getting a lot of these little angles removed, for better or worse.
But for what it's worth... come play multi-player, and if your guy is really worth something, maybe some jerk like me will pay you the first rounder you want for him over there.