The only saving grace for Ambrosio is perhaps his hockey style isn't useful as a 4th line grinder role. Like, I don't think Duchene would be posting up any good numbers having 13 minutes of ice time per game asking to be a tough forechequer. Colby absolutely has agitator qualities, but his game is more along the lines of Bunting/Jarvis than it is as Matt Martin, Derek Ryan, Nick Cousins style. The problem though is that he most definitely does not have Duchene or any sort of 1st rounder type of talent, meaning he's more likely an ECHLer than AHLer atm.
E: Also, every single 2nd or 3rd round draft pick would lose ice time to the likes of Will Smith, Perreault, and Leonard (which was their freshmen class). Projections had him as the 1st line winger before the season, so I do think the coach is messing around with him negatively.