Re: the "eco floor"
There is a saying "bees know best".
I'm cautious of this saying because it is often used or mis used, to try to justify all kinds of crazy ideas.
However, a wild hive in a tree is typically very clean. Contrary to the idea that the wood is part rotten with cracks that harbor all kinds of other creatures, in an established hive the bees actually coat the wood with a wax / propolis mix, and from the bees perspective everything is clean and tidy. Junk at the hive bottom is also removed by the bees, the only exception being if the architecture of the cavity is such that junk accumulates well away from the cluster, too far for the bees to bother going down and retrieving.
"Every viewpoint, is a view from a point." - Solomon Parker