I may not be as knee deep in BL as I was a year ago, but I try to keep up with what's current. Recently I fell upon a discussion where individuals commented on how they were sick of reading BL where it was just about the men falling in love. They wanted something more. They wanted action and adventure with a nice side of love. What these ladies failed to realize is BL is a sub genre of romance; therefore the focus is romance. If the story's focus is adventure than it is an adventure story; it's no longer in the realm of BL just because two guys fall in love at some point in the story.
Think of it this way, it's like reading a mystery novel and then giving it the critique that it focused too much on mystery and the romance should be at the forefront of the story. Sounds a little absurd, right?
Mystery is read for the mystery, adventure for the adventure, and BL for the boys love.
I am not implying genre's can't mix and have awesome little spliced babies, this happens all the time. We've all read or seen a good action/romance. But you're misleading yourself if you come to the BL genre expecting the action to be something other than what goes on between the sheets.