The ability to remove trees, foliage, and other small “baked-in” props would provide EventLab creators more creative freedoms in their maps as well as better optimizing gameplay for the players driving in the map.
I understand some props like buildings an other permanent items would have to be omitted from this suggestion.
I noticed in custom tracks with slightly elevated/floating road props above the ground that trees and other foliage occasionally clip through these road props disrupting the visual gameplay while racing.