Ted Cruz appears to have, at least informally, disclosed the loan in 2012, while running against David Dewhurst in that fateful Senate primary; it just wasn't disclosed when he filed for President. Roll Call reported extensively on the loan in 2013, so it's most certainly common knowledge.
And Ted Cruz can correct any formal financial disclosures by filing a form and, if necessary, paying whatever penalties are attendant to his reprehensible crime. It's a problem, for certain, but it's hardly a game-changing, career-ending, Iowa deal-breaking bit of evidence that Ted Cruz is secretly beholden to big banks and will have to pay his price to Wall Street in the blood of his children.
And Ted Cruz can correct any formal financial disclosures by filing a form and, if necessary, paying whatever penalties are attendant to his reprehensible crime.
Still no revised FEC documents from Team Cruz. Why is Cruz slow playing this? He seems quite comfortable to be in violation of the law on the eve of the Iowa caucus.