Yes, I have to agree that there are many times when a humble silence is the best approach, and a theology of hope.
It seems to me that that though there are boundaries, there is also a great deal of provisionality in what we can say since God seems to choose to act outside our own prescriptions on so many occasions.
I would also say that I find the standard Calvinist approach to the Gospel to be deficient - and I say that as someone who did accept it for a while. But it seems to lack a sense of hope, and it seems too negative in regard to God's creation. The same could be said of some 'orthodox' views though, which are also rather hopeless and negative. Perhaps it is a theological psychology which is at fault. I wonder what a generous Calvinism looks like? And if that has more in common with a generous Orthodoxy?