The Merit system was introduced to reduce spam, including spam from account farmers. What you're proposing would give account farmers all the sMerit they need to rank up by spamming, and I don't think anyone wants to go back there.
What if the community decides Legendary members get sMerit based on recent six month activity? How does that give account farmers the sMerit they need to rank up by spamming? No one wants to go back there, but we need an overhaul. Suggest something.
I believe the merit system is fine, but merit distribution isn't fair.
Your suggestion does not address that - you suggest change to already distributed smerit.