Unable to train Free-Kicks via Development Plans

Been saying this for weeks you also can train penalties and stamina with CB's and you cant train a new position CB or CDM unless they already have it. for example if you have a CDM you cant make him a CB and vice versa. Also the traits that you get for the positions that you scout are dumb as hell all my CB's have long ball pinged pass power shot through ball but then I can get a CM with any passing traits.