He's looked good. Consistently dangerous offensively with a sense that there's still untapped potential, smart transition game and great reads without the puck. What is missing is in-game consistency, intensity and sometimes he gets caught puck staring defensively.
There are areas to work on, but from what I've read he's very dedicated to becoming a reliable two-way player and works very hard on working out the kinks in his game, so that's positive.
I'd say that the likely scenario is that he arrives in the NHL for next season, but he's got a tendency to develop faster and better than expected so TDL is a possibility.