By Christopher Swann and Robert Cyran The authors are Reuters Breakingviews columnists. The opinions expressed are their own. Chesapeake Energy’s decision to do the right thing shouldn’t impress investors. Its directors are only doing so under duress. Stripping Chief Executive Aubrey McClendon of the chairmanship and ending his personal investments in the firm’s wells are obvious and very belated moves. But McClendon’s deal-making and borrowing have accompanied lagging returns. Shareholders deserve more radical changes in the boardroom.