They aren't placed in such a manner to increase safety and braking ability, but instead convenience and personal preference so there really isn't much irony at all. One cable isn't running housing for a portion because it is not running through the same barrel adjuster on the brake itself, instead it is farther up, so it is bare towards the fork crown.
Regardless, I made do with what I have, and it has worked for me. Once again, I have not made any suggestions to run the brake lines this way, I have only shown that you can run two different types of levers if you so choose. As to why I run two different types and on opposite sides, it's just how I wanted it set up, so it's how I have it set up. I understand that the majority of you would want to run them inline and would thus require them to be on the same side, and I have nothing against that. But, I decided to run it this way as it was the only thing I could think of. I suppose it would make you all a little less confused if I ran a standard short pull lever instead of a cross lever.
And again, the reason why the cross lever is setup as such is because I didn't know it could be set up another way, as I have only seen cross levers by themselves and not inline with other levers. I got the lever for free, so I never did any research on the topic.
To OP: I'm glad to see you made a decision, and I'm more than sure that you will be more than pleased.