What about the rest of us?
From the outside, the PCA seems in good shape regarding doctrine on the whole but is lacking liturgically
He has this part pegged. Of course, a good Presbyterian is not supposed to be too liturgical, but rather regulative in worship style. There are a few PCA churches which tend toward liturgical, but you have to look for them. Most of them are trending evangelical in worship style.
and is given in places to inordinate discipline on very secondary matters about which differing exegesis can reasonably be held.
If you don't hold the line on secondary issues, you soon are having to fight for discipline on the major issues. So I'm not sure we don't have this right. You will generally find more flexibility in Presbyteries dominated by large urban areas than in those where there has been a smaller influx of outsiders. (There might also be room to quibble about whether something is secondary or primary).
So I don't see much here which should offend PCA types. He seems to generally have it correct, whether that is taken as a positive or a negative.
You're already pinged. Or if somebody's just wandered in, flail away anyway. *\;-)
"There seems to be a tendency to rationalism in the Reformed tradition that needs careful watching lest it triumph over the grace of the Gospel and patience of Christ with us all."
As someone who grew up in the hard-core Calvinist Reformed tradition, this is something that really is true.
I remarked recently to a Roman Catholic that when I was exploring Catholicism many years ago, I found the rationalist scholastic approach quite familiar. The specifics of belief are of course quite different at many points, but the process of theology is similarly rationalist.