Yes, in the flight plan. On maps (skyvector, google maps, mach7...) we have coordinates, not distances. On skyvector we have distances but they are informative, their calculations are not precise, if we have many sections the sum of those sections will not be the total length of the travel. I actually have to do calculations for all distances. In my opinion only people with paper maps need distances.
How I would like to work. + First Section,latitude,longitude,altitude As it is in PLN files. Actually : + First Section,azimuth,altitude,distance
For you the simplest way is to use the coordinates as it used in MSFS PLN : N45° 5' 15.00",E6° 5' 1.00" For the user the simplest way is to copy the coordinates as it is on its map, and there you have to develop a coordinates converter. That can be boring with all the existing formats and all the errors with special characters.