Players don't just suddenly learn how to improve their disposal and decision making in their 20s. He is what he is - a solid midlist footballer, who'd make some 22's and not others.
The thing is he doesn't 'need to learn' he's a phenomenal kick when he does it right and only needs to make a few minor tweaks to get the errors out, he's going into his 4th year, its not like he's 28. Players absolutely improve their decision making and composure through their early 20s.
Look at Fyfes DE% across his first three years (considerably worse the SPP) Vs look at Fyfe not