Improve the latch design by all means. But to mandate, design, certify, manufacture, and retrofit could (will) take years. In the meantime would it be too much to ask to improve the human factors aspect by instituting a cross check system as is commonly done with other flight critical items. You know, "doors to automatic and cross check" that sort of thing. Banal? Maybe. But it is instructive to remember that the new pitots for F-GZCP (the aircraft operating AF 447) were sitting in the warehouse waiting to be fitted when the aircraft crashed. A known problem, awaiting an engineering fix (recommendation, not an AD). My observation - working in a safety critical industry - is that we tend to adopt a one-dimensional approach to fixing these issues, whereas in fact they are multi-dimensional and include human factors, training, engineering, operational excellence, culture... and a big dollop of common sense.