***It isn't mentioned by name, but the "Puritan regulative principle" a hot topic still amoung PCA***
I'm overseas so I'm not seeing a lot about the regulative principle. Is it a denomination wide debate or more of a local issue? From where I am it seems that the hot issue right now is the New Perspectives on Paul.
I'm not a member of the PCA, but in seminary with a lot of PCAers, and you're probably right that the New Perspectives on Paul are the most "hot" topic right now.
However, in other than the most conservative Presbyterian circles, no one seems to have ever heard of the regulative principle of worship...and that is what I meant (in the big picture) that the regulative principle is still an important issue to the PCA. To the EPC, and certainly the PCUSA, it is a non-issue. Evangelicals in the PCUSA have much bigger fish to fry.
In Anglican circles, even the most conservative, naturally is isn't an issue at all--as Anglicanism rejected Puritanism 300+ years ago.