SARowl,
You have made an impressive list, and it shows how good the S61 has been, but many of those items are shared with a more modern helo. In addition, the next generation can add value (perhaps at the cost of other virtues) here:
Crashworthy structure and absorbing seats to pretect crew and survivors
Crashworthy fuel system to prevent post-crash fires
Floats for Sea State 5 or 6
Tail rotor aurhority for winds at 45 knots
Excess power to support substantial vertical climb in nil wind at maximum SAR weight
All structures, including rotor heads and blades tolerant of significant flaws without crack initiation
Integral electronic maintenance thru HUMS, maintenance computer, onboard diagnostics and pubs with on-line update
Full flat panel symbolic displays with checklists
Enhanced Ground Proximity Warning System integrated into displays
Advanced nav-coupled FMS/autopilot
Protection from turbine bursts
Full Electro Magnetic Interference protection
Full lightening strike protection
30% reduction in maintenance and operating costs
That the original has stood so long is a testament to its great design. Imagine how the 61 looked to those who stepped out of the piston aircraft when it was fielded back in 1961!