It will die down very quickly, as people become used it.
No point in creating a child board in the interim.
Exactly! Overtime, users will have to accept the fact that merit system will be here. They will have to adapt with merit system by changing their threads' contents to be more constructive. Less threads/ topics which cry and moan about merit system in the future, I believe it.
Therefore, I don't think we need a new child board which specifically created for merit system.
I remember that during the first month after launch of merit system, there were dozen of topics about this one and related issues. For now, looking at Meta, Begginers & help boards, I saw less topics about merit system. It is good news.