It's not valor points. You cannot buy raid drops by Valor Points, and developers most of the time deny people good itemized valor items and provide no weapons.
Similar suggestions were made for standard raids as well. To have so me kind of raid currency to get boss drops while content is still current and not in next year or next life.
I am all up for it, but not on LFR-only level. System must be improved globally, as lottery is quite old and unfair system.