Quattros and Merrills DPx takes silghly different kinds of pictures. Merrill sensor gets both crispy micro details and great ambiant-light rendering, it's known to like good lighted scenes but also covered autumn skys... very impressionistic. Shooting with Merrill is teadious or fragile but gives astonishing results when "right on".
Quattros gets sharp details as well, but with better defined colors —like combining the good sides of Canon & Sony's sensors. Color separation is amazing. So instead of lowering sharpness I'll advice to lower saturation. Quattro sensors do good on their own in many situations -so just concentrate on framing...
AF is good enough for rapid shooting as well as for a first positioning to complete manually. The main thing to get used to, &/or configure buttons for, is the enlargement the cam gives you to fine tune your focus. The 8x enlargement start either with any move on the lens ring Or with a dedicated button (which I prefer).
On the SPP software, there is a small learning curve, and the noise reduction options on the left panel needs full testing to give desired smoother or crispier images. Take SPP step as a pre-ACR like dematricing : the idea is to keep all the data in good shape for further post-prod. Also, following your work-flow, take notice how both ends of the spectrogram given in SPP come out on the software you use to futher process the Tiff SPP gives.
Anyway it's a beautiful cam with a beautiful angle of view. Congrats !