Having multiple positions is not always bad. I once had a fast skill gathering 18 year old player who was aml/ml. I got him to learn ST. After playing him, with great success for 6 seasons, I decided to sell him. At the time, he was valued at 74m, but because of his unusual roles, (ST don't usually have wide midfield role), 4 bidders got into a war, I eventually received 197m for him. So multiple roles can work.