This is part of the reason i havent been making much lately. I really hope that there are plans to optimise the map editor- specifically the way that hgt operations are handled. As it is now, the load and save times on a map with any sort of road levelling or ramping etc are prohibitive (this may also be due in part to my less than bleeding edge PC).
Time and energy are a precious resource for many/most adults, and as much as i enjoy the process of creating scenarios and maps, and get a kick from playing them in MP, the time cost is becoming too high for me lately.
The editors are the bread and butter of this software for me, and i commend the addition of features and improvements that have come down the pipe over the last few years, i really hope to be able to make the most of it one day.