The ability to edit level in realtime.....Now this would have to work by mdl file so you would load an level...add models, new plc files make changes then save it back as mdl and put it in the override..
Ive always wanted the ability to move plc or any add new plc models to a new location or put up a new sign somewhere...i know some of it is possible because of the model viewer that was made...i have the ideas but not the ability...thats my suggestion
The old mapmaker is to obsolete needs a new one.