Kathy Willens/APThe Dodgers are 4-0 when Andre Ethier homers.Rebooting after the end of his 30-game hitting streak, Andre Ethier went 2 for 4 Sunday, including a big, breathing-room two-run homer in the seventh inning, the likes of which the Dodgers seem to have rarely seen this season, especially of late. (Los Angeles is averaging 2.7 runs over its past 12 games, and 3.1 runs per game this season in the 32 games that haven't been played in Wrigley Field.)Over the past 24 hours, I've seen speculation that the end of the hitting streak will make Ethier a more productive hitter, on the theory that he won't afraid to swing for the fences and give the Dodgers the power they desperately need. (Ethier's home run was his fourth of the season in 34 games.) I don't want to dismi