The Colombia midfielder currently plays for Olympiakos.
“James is an unbelievable talent and probably one of the most talented players I've ever seen - if not the most talented," Donachie told the Unholy Trinity podcast. "But his injury history was pretty bad when he came in so I had my concerns about that. We had a lot of dialogue about that with Marcel [Brands] and Carlo about whether he'd be able to sustain playing in the Premier League.
“In that respect, it wasn't plain sailing. When he came in and you see him training and playing, he was exceptional. It did get you excited when he was able to play. It's a shame for players like James who can't use their talent and play every week because if he'd have played every week at a full Goodison, it would have been electric. His talent is out of this world, he's incredible.
“There are some ideas about his attitude as well and I think it's absolute nonsense. His attitude is top-class. The thing that stopped him from performing is injuries and it's so often the case. It's really difficult when you've got a talent like that and you can't play and it's really hard for James. There was a lot of excitement in the training ground because he's just brilliant."