We will not get correct idea currently because of a number of reasons. Firstly, there are a number of members abusing the merit system, Some are still sending merits like 10,20 to their alts for meaningless posts.
This eventually will more or less solve itself because if people at some point understand that it's pointless to rank up their alt accounts by giving shitposts Merit, they will stop. In most cases if you apply for a signature campaign spot nowadays, the campaign manager will check what posts have been given Merit, and look right through all the nonsense. This basically means that aside from campaigns managed by baboons, these artificially ranked up accounts won't stand a chance, and thus are pretty much worthless -- this will give account farmers less incentive to continue doing what they used to do. I think it will take at least a month or six before we really notice a decrease in alt-to-alt Merit awards.