For myself, I really like having a spare knife on my multitool. I would probably get rid of the serrated blade on my LM ST300, keeping the straight edged blade. I think it would be awesome if Leatherman offered a customizable chassis-based multitool solution.

There's one guy on EDCF (metropolicity) who has done some pretty awesome Leatherman and other mods I've seen. He's also behind the Skinth sheath.