Those bowling preferences result in whether a bowler is economical or not I think. Therefore, we find a very economical bowler, say Vettori, and compare him to an uneconomical one in game, say Onions (or whoever you find to be uneconomical in your game). Then just check lots of values and see if it makes a difference. Or compare a lot of players
Re the editor, it shouldn't be too hard to implement it in. I think it would be rather simple to be honest. But I don't know how to write C++. I can read it to an extent, but not write it. Also we can add the domestic team to the editor too.