I reckon it'd be cool to be able to change what Special Ability that your player is learning. Just because I have a couple of players learning Abilities that they don't actually need. So, like say you had a Defender learning Free Kick Specialist, but you wanted them to learn Defensive Wall, I reckon you should be able to. But there should be a penalty. Maybe let you keep the amount of Skill Points you've already invested but take away 10% of the Overall Amount needed, so 4-5 Skill Points and let them train a new Special Ability. I also think you should be able to stop a player from learning a new position too. Like if you had no-one for say DMC, so you train you DMR Player, but then end up buying a DMC Player on the Transfer Market. I reckon you should be able to stop training that Role, take a 10% Skill Point Penalty, and then redistribute the Skill Points you invested in the Role, into their Skills or something.
What do people think, Is this doable or not? Feel free to add your own suggestions or refine this idea so it would be better or sound clearer.