The bit that concerns me most is that, if reported correctly, this young FO got up and left the flight deck during a critical stage of flight. Throughout his initial training and continuation training he will have become imbued by the fact that he is a vital part of a two man crew and most needed during the critical stages of flight, i.e. TO and landing. To have cast this aside and decided his personal problems overcame all else is a worry.
One aspect this FO may have to consider is, his actions having become public and the subject of inquiry, whether or not his loss of licence insurers need to be told. Non disclosure of essential information is grounds for underwriters to refuse to pay up, they may consider this to be essential information that the FO is duty bound to disclose. Any underwriters out there like to comment?