1 - What's their profile of a CF? Jackson probably lags behind defensively what they want if that's what you're thinking, and I can agree with that. That said, they have very rangy OF guys with Jennings out there in LF and possibly Guyer out there in RF next year. 2 - The answer to your question is that trading Jackson does not make or break that ultra vague "build from within" plan, Jackson is pretty mid-range for a top prospect, and there are alot of guys who came from within the farm system that are now useable players here. Soto, Barney, the bullpen, and then one of the best young SSs in baseball sounds like within to me. It's such a vague and general description that it's possible to include trading away Cubs' prospects and players for better players when possible in the "build from within" category, isn't it? It's using what they have already to get what they don't have but want.