He's 25 and was one of the worst possession players on the team, and he was unable to develop chemistry with a single other player on the team, except maybe Monahan who deserves to play with better players.
I don't hate Colborne, but I don't see him as a long term piece unless he takes significant strides at both ends and especially in the neutral zone where he's a non factor. I feel like we already have better RW pieces in guys like Jooris, Shore, Poirier, Klimchuk, and despite being 31, Hudler.
He was also guilty of some of the most boneheaded penalties this season, especially in the game against the stars and game 4 vs Anaheim.
Not sure why shore is even in this conversation, I'd easily have colburne over him. Jooris is good in a 4th line capacity, granted he is still young. As others have mentioned, I've seen steady progression out of him since acquisition. Colburne isn't the greatest middle sixer, but I still think he has another gear in him. His POs alone have peaked my interest, I'm interested to see what he brings next year. Some players just take time, hopefully this is true for colburne.