Mathieson looks pretty good in the packs, looks tough & courageous, looks like a really good in-under mid.
But, he wont be a quick fix for us. He will need time to develop & bulk up, which you have to expect from any 19yo. He will fill a need for us as a solid midfielder when he is ready, has good prospects but is not a quick fix.
Oliver was a standout but he will surely be gone by 12, looks ready to play - Voss-like ... wouldn't be disappointed with either Mathieson or Oliver for pick 12.