I would be interested in seeing a configurable heater timeout. The idea would be to have heaters turn off after a set amount of time when a print is not in progress. This would be a good safety feature. It would also help reduce the scenario where the material is loaded and the hotend and is left on for a long period of time before a print is started etc. This can cause carbon build up in the nozzle if the material is sitting in a hot hotend without being extruded.
Maybe this already exists, but could not find any documentation on it.