I would say it'll do a lot to him.Welsh isn't that raw. It's even in his highlights, the kid can be quite aggressive on the defensive side of things.
The big things are a) what does being AFL fit do to Welsh? and b) Do we even want a third tall in the post-Tex world?
2nd point is a very good one. We've been able to get away with it because we've had 3 good talls for the best part of a decade. But now..... I'd be spending a bit of time during the pre season discovering and working on alternatives