it would be possible to make fast new assets and after it an new map with less knowledge about drawing stuff or make things in the right perspective.
on the other side the battle-map would look more organic.
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thanks for the suggestions for an alternative 2.5D map. It would be overall a quite different implementation compared to what we have at the moment for the map (3D with orthographic camera). We originally had a perspective camera and we are thinking to add the option for both orthographic and perspective cameras sooner or later.
Here is an guy who shows how easy it is to make the 2d graphics and than port it in unity
and there are more supported Frameworks and Libraries for Tiled https://doc.mapeditor.org/en/stable/reference/support-for-tmx-maps/