Enhancement: Un-dissolved isochrone polygons from point layer

[magerlin]

When you run isochrones as polygons from layers the resulting polygons for a given distance are dissolved so overlapping polygons for points being close to each other are "glued together".

I am working on catchment areas for bus stops and will like to be able to separate the catchment area for each stop to be able to see how much it adds to the total catchment area. Perhaps some bus stops are less important and could be closed down to make bus run faster?

So a tick box to choose between dissolved or non-dissolved (and potentially overlapping) isochrones would be nice.

(a super additional feature could be if overlaps could be chosen to be removed too, getting isochrones kind of Voronoi stylish so I could see how much of the total catchment area does each bus stop provide)