So Many Unused Maps for BTB

This is what you get about 70% of the time: Exile, Valhalla

The other 25% of the time: Longbow

Meltdown and Vertex make it to the voting booth and get voted in about 5% of the time?

Where is Ravine? (Forge world looking map)
Where is Impact? (Space looking map) <- not sure about the size of this map, never even seen it in Match Making in any playlist.
I’ve never seen an -Erosion- gameplay ever. I don’t even know what that map looks looks like or if it even fits for BTB.

P.S.

Why is Solace not an 8v8 map? Sandbox worked perfectly in H3, and it’s even smaller.