Not saying he should swing for the fences, at least not indiscriminately. But what he's doing now that he hasn't done in the past is "zoning" on pitches when the count is in his favor - or even just neutral counts. In the past it wasn't so much that he swung at too many balls, it was that he went after virtually any pitch which was in or near the strike zone; iow, he was swinging at strikes, but they were pitcher's strikes. Given the choice - when ahead 2-0 in the count - between selectively choosing a pitch and going after it agressively, or automatically taking the pitch because the walk is the ultimate aim, I'll choose the latter more often than not with a speedy/contact hitter. The key, of course, is the discipline to pick out a particular type/location of pitch and spitting on anything else that doesn't fit the criteria. That is what he's developing and it will, in turn, lead to more walks as a matter of course because pitchers have to be much more careful with a dangerous hitter.