Thanks once again for this great software and all the efforts!
Using the new HDRI’s (on exterior scene) seems to result to a much brighter lighting compared to previous or custom HDRI’s used in versions prior 1.7.1. Tweaking this with exposure but generally this causes less saturated colors. The other problem is that the final render image produces two shadows - one from sun and the other from HDRI. It’s practically impossible to match them together.
I’ll post some images as soon as I’ll get to my D5 PC.