New York CNN  —  Two research analysts made waves last week when they called for a major shakeup at tech giant Apple. The analysts weren’t suggesting a logo or product redesign. Instead, they called for the replacement of Tim Cook, the CEO who directly succeeded Steve Jobs in 2011 and helped catapult the company to its $3 trillion valuation . Walter Piecyk and Joe Galone of LightShed Partners, a New York-based technology, media and telecommunications research firm, are questioning whether Cook