I dare to suppose that it is not so "must have" function to be implemented in the nearest future, but showing player's stats and statistics on mobile devices would be really great. Currently it brings some inconvenience to see player's stats on the transfer market (you have to compare it with some of your players) and surely no way to see player's statistics for his ex-club.
On my opininon, this feature would be much better to be implemented on transfer market, but of course every point of view must have it's right for existance.