Leaving aside whether a Distress call would have helped or should be prioritised higher or lower, if one pilot cannot manage the workload then, when carrying passengers or over urban areas at low level, there should be a minimum of two pilots. Yes, that would affect the entire costing and operability of much helicopter usage - the effect would be massive in some market sectors or even make helicopters non-viable, but safety of passengers and those on the ground should come first.
There are other benefits aside from sharing workload; two pilots working in the loop act as a restraint against over-confident, slipshod, or incompetent behaviour.
Please note, I'm not suggesting that any of that was a factor in this accident - we don't know yet - but it has been in others.