For a 3rd rounder, Goulbourne was a bit of a stretch. I recall after the draft him speaking to a reporter saying he was amazed the Flyers took him that high. Was expecting to go in the later rounds. Having said that, he's been one of the better players in camp. As I mentioned in my 2nd day of reviews, Meltzer had a report saying that Hextall offered him an AHL-only deal that his agent told him not to accept. He will work his ass off in training camp to impress management into giving him a regular ELC, but we'll wait to cross that bridge when we get to it.
You mentioned Prust being a similar style player to Goulbourne. If you want to look at anyone on the Flyers who draws a striking resemblance to him, it's Zac Rinaldo. Both are short and stocky. Both are hard workers who like to mix it up. The advantage Goulbourne has is that even with his chippy play, he doesn't go over the edge as much as Rinaldo might. Plus he has a much better skill set now than Rinaldo did when he was in juniors. You could even argue that Goulbourne has the better skill set between the two at this time. I feel Goulbourne will be a player that can slip right into the Flyers lineup in Rinaldo's place whenever he leaves or goes down with injury.