It was nice having the FE to run the systems but that luxury doesn't exist any more because of economics. The checklists have been simplified so a two man crew can run them because now they are brief for abnormals
On a 3 man airplane you could isolate electrical faults like electrical smoke unknown source, now you do the basics, if anything and just land. Of course the SwissAir Halifax crash could have probably been prevented if they had an engineer to shut down the non essential entertainment system instead of just trying to land with it still being powered. It is all economics and we will never go back. Normal days everything will be fine.