Double Jib Sheets - A Better Mousetrap?

Recently I learned about a different, apparently new way to rig jib sheets on a sailboat of size, especially one with a furling jib. This approach uses two sheets on each side and allows efficient adjustment of sail shape without having to move jib sheet block cars back and forth on a track after changing point of sail or furling or unfurling the jib. While there may be a downside, I'm always intrigued by new ways to accomplish old tasks. Might this be a better mousetrap? Check it out, and if you have thoughts about this leave a comment!