I am hardpressed, however, at trying to find a meter for quality RP however.
So far the best way to make quality RP has been these dicussions on the forums. As we debate about how to interpret the splintered in-game information, we also end up informing ourselves of the repective RP of the information debated.
To make a measure of quality RP may require a lot of research and debating for each and every Freelancer faction in order to make RP guidelines to hold as a template to which each factions RP should be measure to.
Could be a lot of work and might find it more restrictive to RP.
But that may only be one avenue from one point of view, could be a complicated thing indeed.