If the existing market for Call of Cthulhu were that great, Chaosium wouldn't be in such dire straights.
They need to expand the market.
BRP isn't a terrible system, but it's old, and frankly, it's age shows quite badly. I realize that the people at Chaosium have a huge chip on their shoulder and look down on d20 (they've literally said so), even though BRP is nothing more than original D&D with a 100% skill system. But they need to overlook that bias.
I'm not saying they should completely drop the system. But why not dual stat? It really doesn't take that much room. Heck, why not tri or quad stat? Chaosium should work their contacts and try to get the rights to use other cinematic systems for Pulp Cthulhu - D6 and Savage Worlds leaps to mind.