Jamieson is still very raw and unknown. It always tends to be tough to predict how those big skinny kids fill out and grow into their body and the game. Another year in the colts system hasn't hurt him as he has been handy across the year and shown a bit. I'm not convinced he'll be a great ruck but there are worse directions to go for a rookie pick to develop.
This article about Brodie Kemp and his knee is interesting. He likes to compare himself to Cripps and Fyfe and I reckon would love the opportunity to grow and develop in the same side as Nat. A country kid, he'll do great things for whoever he gets picked up by.