One obvious advantage to that form of meditation is realizing that you aare not your thoughts or emotions, and that another part of you can passively observe them. Itt teachs a mental discipline in that while attempting to WILD a passive awareness work well, but if you direct your focus at what you are experiencing you often interupt the process. So, while in the end it would be good to master all sorts of different meditation skills, the one you are using now, is a good thing for LDing, and mental discipline in general.