BIAB only looks so cluttered and uninviting because PG has responded to its users who have asked for so many bolt on functions.
This is partially true ... part of the art of evolving and advancing products, especially software, is in seeing the emerging patterns and forming the product into a cohesive and elegant whole. "Bolting on" seems to be PGM's way, but what one ends up with, by so doing, in a Heath-Robinson-esque construction.
(William Heath Robinson's drawings may be unfamiliar to some ... here's a link if wanted
Heath Robinson's absurdly ingenious inventions )