Me thinks you overrate the Hutch a little too much. Fact is he's 24 next month and now at his second AFL club and has only played 25 games to date. If he had the skills, tackling ability and pace as you are making out then he wouldn't have slid to the Rookie Draft in 2009, and cut by St Kilda after one year on their list.
As for tackling when required? Priddis' career high in a match is 18 btw. Priddis isn't the most skilled player in the comp, but like it or not he's still currently the best of what we got until the likes of Waterman, Sheed and Duggan develop. I know a lot of people on here are desperate to replace him, but Hutchings is not the answer we seek and is more of the same.
I do agree College needs more game time to see what he can do, but it will be at the expense of Masten/Sheppard/Wellingham or another outside flanker as that's what his game it.