I don't have any real thoughts on where Sione's best position is - he has positives and negatives in all the positions he has been tried in, but is still maybe 3 years off the age when players reach their potential.
The one thing I would add is that he has been put in our forwards to give them more grunt and impact because we have the youngest and weakest forward rotation in the comp. The forward pack has to be 8 or 9 players working as a group to win the war of attrition against the 8 or 9 opposition forwards, and when you judge any of our forwards over the last two years, you have to take into account that they are part of a small and weak group that gets monstered every week.
In other words, if you dropped Sione into Cronulla's pack, his numbers would be much more impressive, because he would be running at tired and demoralised forwards, instead of being one.
Looking at his numbers, or the numbers of any of our forwards, in isolation gives a picture that they, as individuals, don't match up to a guy like say Eseese, who gets to play with a very strong pack around him, but once we put together a much stronger pack next year, we'll see the numbers of guys like Dan, Sione, Jake and Barnett will also increase, as they become part of a pack that is getting over the top of oppositions for a change.
People bring up young kids who have better numbers than our young kids, but most of them are playing as the junior members of great packs, and all our young kids, like Sione, are trying to be a pack leader of a bunch of kids.