When Ralph de la Torre resigned Tuesday from Steward Health Care, many of the nurses and doctors across the national hospital chain rejoiced and called it the start of a new era. But the new Steward may not look all that different from the old one. Steward's board of directors, in a step experts in corporate governance call highly unusual, eschewed appointing a successor to de la Torre, leaving the teetering health system without even an interim CEO or chairman. Now, Steward is led by that same board — and many of the same people — that seems to have offered little or no resistance as Steward's hospitals were starved of resources and de la Torre got rich on massive dividends.