@Salodo Actually I use the AStarGrid2D for the pathfinding and no collision, the collision just turns on for a splitsecond when the unit reached its target to get the building its on, or later trees etc.
I was wondering if I switch at some point to the AStar2D and create the points of the street dynamically. Its just unconvinient to work with that and tilmaps together. Currently i just switch the roadtile from solid to not solid and thats it. Unloading or lowering the tickrate sounds great at some point ill look into it how to do it, but especially unloading could really play into the custom AStar2D.