@Bottlecapn
This is legitimately interesting, but I gotta say I'm a bit confused here. Is the "total" BP value you have basically a sum of the scores from matches from E3/whatever, and then based on how high that number is you're drawing the size of the map from it (since points are basically a point-based measure of surface area)?
If so then one way this could be severely flawed is that, as you mentioned, spraying over enemy ink adds to the point count. Because of this you could theorycraft that in a smaller stage/stage with more hotly contested chokepoints you may be getting a high amount of points based solely on the fact that there's a lot more back-and-forth gameplay. Like say, you might be covering the same area 10 times over in such a stage as opposed to 5 times over in a larger map (these are just pretend values but I hope you understand).
Let's figure this out, because I like this and want to do something involving maps when the game releases!
Larger maps typically but maps with good "lanes" are also great. keep in mind a sniper is not always in a crows nest looking for people to pick off. anything that gives you a clear shot while still distancing you from the person is great for a sniper-like weapon.