Its a rough guide for determining the potential chance that what somebody has to say is going to be interesting.
If this is what you're looking for, why don't you just divide Merit by Posts? Add one to give Newbies an unbiased chance, so:WoP2.0 = (Merit earned + 1) / Posts. That would give:
satoshi: 2.10
theymos: 0.33
LoyceV: 0.17
soniclord: 0.00
WoP of Zaarin = [(0+1)/3136]x266 = 0.0848
WoP of krizpogi18 = [(0+1)/2662]x224 = 0.0841
So do you believe the Zaarin is worthy poster than krizpogi18 when comparing just two of them? I believe the answer is No. Zaarin was registered earlier than the other user and where he achieved more activity than krizpogi18. We cannot take the number of activity as a criterion when we calculating the WoP because the activity is the second barrier after merits for avoiding users to rank up just by gaining merits whether truly or abusive manner. If activity barrier isn't there users will ultimately rank up just gaining merits. What theymos has done is put the time factor into the equation when calculating the user rank which stopped the users getting rank up sometimes within one night (we all know merit is trading in the black market). That will give users also extra time for being active and being a responsible member.
In a nutshell, multiplying the activity when calculating the WoP would not yield a good figure for a comparison of users.
I became fascinated when I saw one particular poster had 2600+ posts, zero merit and such a low activity. Now with the new merit requirements my fascination is reinvigorated: who can find a score lower than krizpogi18 (0.084)? If you find one I may very well issue you a merit for your work!
Lowest I see is
Zaarin - 0.08474036214
3,139 posts. no merit
Quote
You need more decimal places in your number to see if I win. 
Even with the more decimal places, you didn't win Vod in this time 
Vod's BPIP also uses a formula for most recognized posters - on a similar theme, but is based on merit, activity and trust: https://bitcointalk.org/index.php?topic=4799468.0
I think we don't want to consider the trust when calculating the WoP because trust is nothing to do with the worthiness of the poster. Having a higher trust score doesn't mean the poster is worthy or vice versa. Its ok for when calculating the recognition as done in BPIP