I've only read the first of the Kern series, but sadly, it was enough of a slog for me that I won't revisit that trilogy.
I agree almost entirely with the review. The one novel felt tremendously padded, with inordinate detail given to mundane elements and a lack of a strong dramatic arc.
On the other hand, I'd love to see a collection of new Hyborian Age short stories... maybe they could get an all-star roster of fantasy/horror authors to write short stories set in the Hyborian Age, or even actual Conan stories? For example, having a single volume with short stories by Neil Gaiman, David Gemmell, Greg Keyes, George RR Martin, Stephen King, et al. would be a must-have, and the short story format would be less restrictive and more in the flavor of Howard. Also, an anthology would be much easier on the reader - you don't like one story? Ten pages later, there's a different one.